diff --git a/manimlib/scene/scene_file_writer.py b/manimlib/scene/scene_file_writer.py
index 4aa6ffd3..a8546fb7 100644
--- a/manimlib/scene/scene_file_writer.py
+++ b/manimlib/scene/scene_file_writer.py
@@ -13,7 +13,6 @@ from pathlib import Path
 
 from manimlib.logger import log
 from manimlib.mobject.mobject import Mobject
-from manimlib.utils.file_ops import add_extension_if_not_present
 from manimlib.utils.file_ops import get_sorted_integer_files
 from manimlib.utils.file_ops import guarantee_existence
 from manimlib.utils.sounds import get_full_sound_file_path
diff --git a/manimlib/utils/file_ops.py b/manimlib/utils/file_ops.py
index 20e2152f..52e32bd3 100644
--- a/manimlib/utils/file_ops.py
+++ b/manimlib/utils/file_ops.py
@@ -17,14 +17,6 @@ if TYPE_CHECKING:
     from typing import Iterable
 
 
-def add_extension_if_not_present(file_name: str, extension: str) -> str:
-    # This could conceivably be smarter about handling existing differing extensions
-    if(file_name[-len(extension):] != extension):
-        return file_name + extension
-    else:
-        return file_name
-
-
 def guarantee_existence(path: str | Path) -> Path:
     path = Path(path)
     path.mkdir(parents=True, exist_ok=True)