diff --git a/.ci/setup.sh b/.ci/setup.sh
index d3b4fffb5ca5..da381692feee 100755
--- a/.ci/setup.sh
+++ b/.ci/setup.sh
@@ -2,154 +2,134 @@
 
 set -e -E -u -o pipefail
 
-# defaults
-AZURE=${AZURE:-"false"}
-IN_UBUNTU_BASE_CONTAINER=${IN_UBUNTU_BASE_CONTAINER:-"false"}
-SETUP_CONDA=${SETUP_CONDA:-"true"}
+# if [[ $OS_NAME == "macos" ]]; then
+#     if  [[ $COMPILER == "clang" ]]; then
+#         brew install libomp
+#         if [[ $AZURE == "true" ]]; then
+#             sudo xcode-select -s /Applications/Xcode_13.1.0.app/Contents/Developer || exit 1
+#         fi
+#     else  # gcc
+#         # Check https://github.com/actions/runner-images/tree/main/images/macos for available
+#         # versions of Xcode
+#         sudo xcode-select -s /Applications/Xcode_14.3.1.app/Contents/Developer || exit 1
+#         brew install 'gcc@12'
+#     fi
+#     if [[ $TASK == "mpi" ]]; then
+#         brew install open-mpi
+#     fi
+#     if [[ $TASK == "swig" ]]; then
+#         brew install swig
+#     fi
+# else  # Linux
+#     if type -f apt 2>&1 > /dev/null; then
+#         sudo apt-get update
+#         sudo apt-get install --no-install-recommends -y \
+#             ca-certificates \
+#             curl
+#     else
+#         sudo yum update -y
+#         sudo yum install -y \
+#             ca-certificates \
+#             curl
+#     fi
+#     CMAKE_VERSION="3.30.0"
+#     curl -O -L \
+#         https://github.com/Kitware/CMake/releases/download/v${CMAKE_VERSION}/cmake-${CMAKE_VERSION}-linux-${ARCH}.sh \
+#     || exit 1
+#     sudo mkdir /opt/cmake || exit 1
+#     sudo sh cmake-${CMAKE_VERSION}-linux-${ARCH}.sh --skip-license --prefix=/opt/cmake || exit 1
+#     sudo ln -sf /opt/cmake/bin/cmake /usr/local/bin/cmake || exit 1
 
-ARCH=$(uname -m)
+#     if [[ $IN_UBUNTU_BASE_CONTAINER == "true" ]]; then
+#         # fixes error "unable to initialize frontend: Dialog"
+#         # https://github.com/moby/moby/issues/27988#issuecomment-462809153
+#         echo 'debconf debconf/frontend select Noninteractive' | sudo debconf-set-selections
 
+#         sudo apt-get update
+#         sudo apt-get install --no-install-recommends -y \
+#             software-properties-common
 
-if [[ $OS_NAME == "macos" ]]; then
-    if  [[ $COMPILER == "clang" ]]; then
-        brew install libomp
-        if [[ $AZURE == "true" ]]; then
-            sudo xcode-select -s /Applications/Xcode_13.1.0.app/Contents/Developer || exit 1
-        fi
-    else  # gcc
-        # Check https://github.com/actions/runner-images/tree/main/images/macos for available
-        # versions of Xcode
-        sudo xcode-select -s /Applications/Xcode_14.3.1.app/Contents/Developer || exit 1
-        brew install 'gcc@12'
-    fi
-    if [[ $TASK == "mpi" ]]; then
-        brew install open-mpi
-    fi
-    if [[ $TASK == "swig" ]]; then
-        brew install swig
-    fi
-else  # Linux
-    if type -f apt 2>&1 > /dev/null; then
-        sudo apt-get update
-        sudo apt-get install --no-install-recommends -y \
-            ca-certificates \
-            curl
-    else
-        sudo yum update -y
-        sudo yum install -y \
-            ca-certificates \
-            curl
-    fi
-    CMAKE_VERSION="3.30.0"
-    curl -O -L \
-        https://github.com/Kitware/CMake/releases/download/v${CMAKE_VERSION}/cmake-${CMAKE_VERSION}-linux-${ARCH}.sh \
-    || exit 1
-    sudo mkdir /opt/cmake || exit 1
-    sudo sh cmake-${CMAKE_VERSION}-linux-${ARCH}.sh --skip-license --prefix=/opt/cmake || exit 1
-    sudo ln -sf /opt/cmake/bin/cmake /usr/local/bin/cmake || exit 1
+#         sudo apt-get install --no-install-recommends -y \
+#             build-essential \
+#             git \
+#             libcurl4 \
+#             libicu-dev \
+#             libssl-dev \
+#             locales \
+#             locales-all || exit 1
+#         if [[ $COMPILER == "clang" ]]; then
+#             sudo apt-get install --no-install-recommends -y \
+#                 clang \
+#                 libomp-dev
+#         elif [[ $COMPILER == "clang-17" ]]; then
+#             sudo apt-get install --no-install-recommends -y \
+#                 wget
+#             wget -qO- https://apt.llvm.org/llvm-snapshot.gpg.key | sudo tee /etc/apt/trusted.gpg.d/apt.llvm.org.asc
+#             sudo apt-add-repository deb http://apt.llvm.org/jammy/ llvm-toolchain-jammy-17 main
+#             sudo apt-add-repository deb-src http://apt.llvm.org/jammy/ llvm-toolchain-jammy-17 main
+#             sudo apt-get update
+#             sudo apt-get install -y \
+#                 clang-17 \
+#                 libomp-17-dev
+#         fi
 
-    if [[ $IN_UBUNTU_BASE_CONTAINER == "true" ]]; then
-        # fixes error "unable to initialize frontend: Dialog"
-        # https://github.com/moby/moby/issues/27988#issuecomment-462809153
-        echo 'debconf debconf/frontend select Noninteractive' | sudo debconf-set-selections
-
-        sudo apt-get update
-        sudo apt-get install --no-install-recommends -y \
-            software-properties-common
-
-        sudo apt-get install --no-install-recommends -y \
-            build-essential \
-            git \
-            libcurl4 \
-            libicu-dev \
-            libssl-dev \
-            locales \
-            locales-all || exit 1
-        if [[ $COMPILER == "clang" ]]; then
-            sudo apt-get install --no-install-recommends -y \
-                clang \
-                libomp-dev
-        elif [[ $COMPILER == "clang-17" ]]; then
-            sudo apt-get install --no-install-recommends -y \
-                wget
-            wget -qO- https://apt.llvm.org/llvm-snapshot.gpg.key | sudo tee /etc/apt/trusted.gpg.d/apt.llvm.org.asc
-            sudo apt-add-repository deb http://apt.llvm.org/jammy/ llvm-toolchain-jammy-17 main
-            sudo apt-add-repository deb-src http://apt.llvm.org/jammy/ llvm-toolchain-jammy-17 main
-            sudo apt-get update
-            sudo apt-get install -y \
-                clang-17 \
-                libomp-17-dev
-        fi
-
-        export LANG="en_US.UTF-8"
-        sudo update-locale LANG=${LANG}
-        export LC_ALL="${LANG}"
-    fi
-    if [[ $TASK == "r-package" ]] && [[ $COMPILER == "clang" ]]; then
-        sudo apt-get install --no-install-recommends -y \
-            libomp-dev
-    fi
-    if [[ $TASK == "mpi" ]]; then
-        if [[ $IN_UBUNTU_BASE_CONTAINER == "true" ]]; then
-            sudo apt-get update
-            sudo apt-get install --no-install-recommends -y \
-                libopenmpi-dev \
-                openmpi-bin
-        else  # in manylinux image
-            sudo yum update -y
-            sudo yum install -y \
-                openmpi-devel \
-            || exit 1
-        fi
-    fi
-    if [[ $TASK == "gpu" ]]; then
-        if [[ $IN_UBUNTU_BASE_CONTAINER == "true" ]]; then
-            sudo apt-get update
-            sudo apt-get install --no-install-recommends -y \
-                libboost1.74-dev \
-                libboost-filesystem1.74-dev \
-                ocl-icd-opencl-dev
-        else  # in manylinux image
-            sudo yum update -y
-            sudo yum install -y \
-                boost-devel \
-                ocl-icd-devel \
-                opencl-headers \
-            || exit 1
-        fi
-    fi
-    if [[ $TASK == "gpu" || $TASK == "bdist" ]]; then
-        if [[ $IN_UBUNTU_BASE_CONTAINER == "true" ]]; then
-            sudo apt-get update
-            sudo apt-get install --no-install-recommends -y \
-                pocl-opencl-icd
-        elif [[ $(uname -m) == "x86_64" ]]; then
-            sudo yum update -y
-            sudo yum install -y \
-                ocl-icd-devel \
-                opencl-headers \
-            || exit 1
-        fi
-    fi
-    if [[ $TASK == "cuda" ]]; then
-        echo 'debconf debconf/frontend select Noninteractive' | debconf-set-selections
-        if [[ $COMPILER == "clang" ]]; then
-            apt-get update
-            apt-get install --no-install-recommends -y \
-                clang \
-                libomp-dev
-        fi
-    fi
-fi
-
-if [[ "${TASK}" != "r-package" ]] && [[ "${TASK}" != "r-rchk" ]]; then
-    if [[ $SETUP_CONDA != "false" ]]; then
-        curl \
-            -sL \
-            -o miniforge.sh \
-            https://github.com/conda-forge/miniforge/releases/latest/download/Miniforge3-$(uname)-${ARCH}.sh
-        sh miniforge.sh -b -p $CONDA
-    fi
-    conda config --set always_yes yes --set changeps1 no
-    conda update -q -y conda
-fi
+#         export LANG="en_US.UTF-8"
+#         sudo update-locale LANG=${LANG}
+#         export LC_ALL="${LANG}"
+#     fi
+#     if [[ $TASK == "r-package" ]] && [[ $COMPILER == "clang" ]]; then
+#         sudo apt-get install --no-install-recommends -y \
+#             libomp-dev
+#     fi
+#     if [[ $TASK == "mpi" ]]; then
+#         if [[ $IN_UBUNTU_BASE_CONTAINER == "true" ]]; then
+#             sudo apt-get update
+#             sudo apt-get install --no-install-recommends -y \
+#                 libopenmpi-dev \
+#                 openmpi-bin
+#         else  # in manylinux image
+#             sudo yum update -y
+#             sudo yum install -y \
+#                 openmpi-devel \
+#             || exit 1
+#         fi
+#     fi
+#     if [[ $TASK == "gpu" ]]; then
+#         if [[ $IN_UBUNTU_BASE_CONTAINER == "true" ]]; then
+#             sudo apt-get update
+#             sudo apt-get install --no-install-recommends -y \
+#                 libboost1.74-dev \
+#                 libboost-filesystem1.74-dev \
+#                 ocl-icd-opencl-dev
+#         else  # in manylinux image
+#             sudo yum update -y
+#             sudo yum install -y \
+#                 boost-devel \
+#                 ocl-icd-devel \
+#                 opencl-headers \
+#             || exit 1
+#         fi
+#     fi
+#     if [[ $TASK == "gpu" || $TASK == "bdist" ]]; then
+#         if [[ $IN_UBUNTU_BASE_CONTAINER == "true" ]]; then
+#             sudo apt-get update
+#             sudo apt-get install --no-install-recommends -y \
+#                 pocl-opencl-icd
+#         elif [[ $(uname -m) == "x86_64" ]]; then
+#             sudo yum update -y
+#             sudo yum install -y \
+#                 ocl-icd-devel \
+#                 opencl-headers \
+#             || exit 1
+#         fi
+#     fi
+#     if [[ $TASK == "cuda" ]]; then
+#         echo 'debconf debconf/frontend select Noninteractive' | debconf-set-selections
+#         if [[ $COMPILER == "clang" ]]; then
+#             apt-get update
+#             apt-get install --no-install-recommends -y \
+#                 clang \
+#                 libomp-dev
+#         fi
+#     fi
+# fi