diff --git a/crates/macroattr/src/lib.rs b/crates/macroattr/src/lib.rs
index 7a2f42a..64d842c 100644
--- a/crates/macroattr/src/lib.rs
+++ b/crates/macroattr/src/lib.rs
@@ -17,4 +17,3 @@
 // macro_attr
 
 // ----------------------------------------------------------------
-mod syntax;
diff --git a/crates/macroattr/src/syntax.rs b/crates/macroattr/src/syntax.rs
deleted file mode 100644
index 7cca31b..0000000
--- a/crates/macroattr/src/syntax.rs
+++ /dev/null
@@ -1,21 +0,0 @@
-/*
- * Copyright © 2024 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-// syntax
-
-// ----------------------------------------------------------------
-
-pub(crate) mod parser;
diff --git a/crates/macroattr/src/syntax/parser.rs b/crates/macroattr/src/syntax/parser.rs
deleted file mode 100644
index bdcab36..0000000
--- a/crates/macroattr/src/syntax/parser.rs
+++ /dev/null
@@ -1,118 +0,0 @@
-/*
- * Copyright © 2024 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#![allow(dead_code)]
-
-// @copy from [lombokrs](https://github.com/photowey/lombokrs)
-
-// syntax/parser
-
-// ----------------------------------------------------------------
-
-use proc_macro::TokenStream;
-
-use syn::punctuated::Punctuated;
-use syn::token::Comma;
-use syn::{
-    parse, AttributeArgs, Data, DataStruct, DeriveInput, Field, Fields, Lit, Meta, NestedMeta,
-};
-
-// ---------------------------------------------------------------- DeriveInput
-
-pub(crate) fn try_derive_input(input: TokenStream) -> DeriveInput {
-    parse(input).unwrap()
-}
-
-// ---------------------------------------------------------------- Field
-
-pub(crate) fn try_named_fields(input: &DeriveInput) -> &Punctuated<Field, Comma> {
-    let struct_name = &input.ident;
-
-    match &input.data {
-        Data::Struct(DataStruct {
-            fields: Fields::Named(fields),
-            ..
-        }) => &fields.named,
-        _ => panic!(
-            "syntax: struct:`{}` does not contain named fields!",
-            struct_name
-        ),
-    }
-}
-
-pub(crate) fn try_unnamed_fields(input: &DeriveInput) -> &Punctuated<Field, Comma> {
-    let struct_name = &input.ident;
-
-    match &input.data {
-        Data::Struct(DataStruct {
-            fields: Fields::Unnamed(fields),
-            ..
-        }) => &fields.unnamed,
-        _ => panic!(
-            "syntax: struct:`{}` does not contain unnamed fields!",
-            struct_name
-        ),
-    }
-}
-
-pub(crate) fn try_match_fields(input: &DeriveInput) -> &Punctuated<Field, Comma> {
-    let struct_name = &input.ident;
-
-    match &input.data {
-        Data::Struct(DataStruct {
-            fields: Fields::Named(fields),
-            ..
-        }) => &fields.named,
-        Data::Struct(DataStruct {
-            fields: Fields::Unnamed(fields),
-            ..
-        }) => &fields.unnamed,
-        _ => panic!(
-            "syntax: struct:`{}` does not contain any fields!",
-            struct_name
-        ),
-    }
-}
-
-// ----------------------------------------------------------------
-
-#[doc(hidden)]
-pub(crate) fn try_attribute_args(attr: &str, args: AttributeArgs) -> Option<String> {
-    let mut attrbute = None;
-
-    for arg in args {
-        match arg {
-            NestedMeta::Meta(Meta::NameValue(nv)) => {
-                if nv.path.is_ident(attr) {
-                    if let Lit::Str(n) = nv.lit {
-                        attrbute = Some(n.value());
-                    }
-                }
-            }
-            _ => {}
-        }
-    }
-
-    attrbute
-}
-
-#[doc(hidden)]
-pub(crate) fn try_first_attribute_args(args: AttributeArgs) -> Option<String> {
-    match args.first() {
-        Some(NestedMeta::Lit(Lit::Str(v))) => Some(v.value()),
-        _ => None,
-    }
-}