Revert "Update codeflash/code_utils/code_replacer.py"

This reverts commit 04fc3e6.

Author: KRRT7

codeflash/code_utils/code_replacer.py

@@ -341,7 +341,8 @@ def function_to_optimize_original_worktree_fqn(
 
 class AssertCleanup:
     def transform_asserts(self, code: str) -> str:
-        for line in code.splitlines():
+        lines = code.splitlines()
+        result_lines = []
 
         for line in lines:
             transformed = self._transform_assert_line(line)