diff --git a/tasks/ast_tools/src/fmt.rs b/tasks/ast_tools/src/fmt.rs
index df45187dba330..3a85c7256bf76 100644
--- a/tasks/ast_tools/src/fmt.rs
+++ b/tasks/ast_tools/src/fmt.rs
@@ -5,16 +5,9 @@ use proc_macro2::TokenStream;
 use regex::{Captures, Regex, Replacer};
 use syn::parse_file;
 
-static INSERT_MACRO_IDENT: &str = "insert";
-static ENDL_MACRO_IDENT: &str = "endl";
-static WHITE_SPACES: &str = " \t";
-
 /// Pretty print
 pub fn pretty_print(input: &TokenStream) -> String {
     let result = prettyplease::unparse(&parse_file(input.to_string().as_str()).unwrap());
-    // `insert!` and `endl!` macros are not currently used
-    // let result = ENDL_REGEX.replace_all(&result, EndlReplacer);
-    // let result = INSERT_REGEX.replace_all(&result, InsertReplacer).to_string();
     let result = COMMENT_REGEX.replace_all(&result, CommentReplacer).to_string();
     result
 }
@@ -59,64 +52,5 @@ impl Replacer for CommentReplacer {
 }
 
 lazy_static! {
-    static ref COMMENT_REGEX: Regex =
-        Regex::new(format!(r"[{WHITE_SPACES}]*//[/!]@(.*)").as_str()).unwrap();
-}
-
-/// Replace `insert!` macro calls with the contents of the `insert!`.
-///
-/// e.g. `insert!("#![allow(dead_code)]")` is replaced by `#![allow(dead_code)]`.
-///
-/// We use this when inserting outer attributes (`#![allow(unused)]`) or plain comments (`//` not `///`).
-/// `quote!` macro ignores plain comments, so it's not possible to produce them otherwise.
-#[expect(dead_code)] // `insert!` macro is not currently used
-struct InsertReplacer;
-
-impl Replacer for InsertReplacer {
-    fn replace_append(&mut self, caps: &Captures, dst: &mut String) {
-        assert_eq!(caps.len(), 2);
-        let arg = caps.get(1);
-        if let Some(arg) = arg {
-            dst.push_str(arg.as_str());
-        }
-    }
-}
-
-lazy_static! {
-    static ref INSERT_REGEX: Regex = Regex::new(
-        format!(
-            r#"(?m)^[{WHITE_SPACES}]*{INSERT_MACRO_IDENT}!\([\n\s\S]*?\"([\n\s\S]*?)\"[\n\s\S]*?\);$"#
-        )
-        .as_str()
-    )
-    .unwrap();
-}
-
-/// Remove `endl!();`, so it produces a line break.
-///
-/// e.g.:
-/// ```
-/// use oxc_allocator::Allocator;
-/// endl!();
-/// use oxc_ast::*;
-/// ```
-/// becomes:
-/// ```
-/// use oxc_allocator::Allocator;
-///
-/// use oxc_ast::*;
-/// ```
-///
-/// We use `endl!();` because `quote!` macro ignores whitespace,
-/// so we have to use another means to generate line breaks.
-#[expect(dead_code)] // `endl!` macro is not currently used
-struct EndlReplacer;
-
-impl Replacer for EndlReplacer {
-    fn replace_append(&mut self, _: &Captures, _: &mut String) {}
-}
-
-lazy_static! {
-    static ref ENDL_REGEX: Regex =
-        Regex::new(format!(r"[{WHITE_SPACES}]*{ENDL_MACRO_IDENT}!\(\);").as_str()).unwrap();
+    static ref COMMENT_REGEX: Regex = Regex::new(r"[ \t]*//[/!]@(.*)").unwrap();
 }