diff --git a/crates/swc_ecma_transforms_optimization/src/simplify/branch/tests.rs b/crates/swc_ecma_transforms_optimization/src/simplify/branch/tests.rs
index 52810c61760a..a403e15a2d10 100644
--- a/crates/swc_ecma_transforms_optimization/src/simplify/branch/tests.rs
+++ b/crates/swc_ecma_transforms_optimization/src/simplify/branch/tests.rs
@@ -1833,48 +1833,3 @@ fn issue_6732_2() {
         "var foo;",
     );
 }
-
-fn test_with_comments(input: &str, expected: &str) {
-    swc_ecma_transforms_testing::Tester::run(|tester| {
-        let unresolved_mark = Mark::new();
-        let top_level_mark = Mark::new();
-        let tr = chain!(
-            resolver(unresolved_mark, top_level_mark, false),
-            paren_remover(None),
-            expr_simplifier(top_level_mark, Default::default()),
-            as_folder(super::Remover {
-                changed: false,
-                normal_block: Default::default(),
-                expr_ctx: ExprCtx {
-                    unresolved_ctxt: SyntaxContext::empty().apply_mark(unresolved_mark),
-                    // This is hack
-                    is_unresolved_ref_safe: true,
-                },
-            })
-        );
-
-        let actual = tester.apply_transform(tr, "input.js", Default::default(), input)?;
-        let comments = std::mem::take(&mut tester.comments);
-        let actual_src = tester.print(&actual, &comments);
-
-        if actual_src != expected {
-            println!(">>>>> Orig <<<<<\n{}", input);
-            println!(">>>>> Code <<<<<\n{}", actual_src);
-            panic!(
-                r#"assertion failed: `(left == right)`
-    {}"#,
-                ::testing::diff(&actual_src, expected),
-            );
-        }
-
-        Ok(())
-    });
-}
-
-#[test]
-fn test_seq() {
-    test_with_comments(
-        "const Test1 = /*#__PURE__*/ (0, forwardRef)(Foo);",
-        "const Test1 = /*#__PURE__*/ forwardRef(Foo);\n",
-    )
-}