Remove unused os_error_exc variable

src/ytdl_sub/utils/file_handler.py

@@ -361,7 +361,7 @@ class FileHandler:
         """
         try:
             shutil.move(src=src_file_path, dst=dst_file_path)
-        except OSError as os_error_exc:
+        except OSError:
             # Invalid cross-device link
             # Can happen from using os.rename under the hood, which requires the two file on the
             # same filesystem. Work around it by copying and deleting the file