Remove OpenSeesPy dependency

Users should pip install either OpenSeesRT or OpenSeesPy.

.github/workflows/build_docs.yaml

@@ -23,6 +23,7 @@ jobs:
           sudo apt-get install -y pandoc
           python -m pip install --upgrade pip
           python -m pip install -r requirements_dev.txt
+          python -m pip install openseespy
           python -m pip install -e .
       - name: Build docs
         run: cd docs && make html

.github/workflows/test_and_deploy.yaml

@@ -22,6 +22,7 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           python -m pip install -r requirements_dev.txt
+          python -m pip install openseespy
           python -m pip install -e .
       - name: flake8
         run: flake8 src

setup.cfg

@@ -23,7 +23,6 @@ packages =
     osmg.postprocessing
     osmg.preprocessing
 install_requires =
-    opensees>=0.0.46
     plotly>=4.14.3
     matplotlib>=3.4.1
     pandas>=1.2.4