Revert "fix windows os error"

This reverts commit 2a8925455a.

controllers/path_handler.py

@@ -9,13 +9,4 @@ def fix_windows_path(dos_path: str, encoding=None):
             return u"\\\\?\\UNC\\" + path[2:]
         return u"\\\\?\\" + path
     else:
-        return dos_path
-
-def windows_join_path(og_path: str, join: str):
-    if os.name == 'nt':
-        final_path = og_path
-        for dir in join.split('/'):
-            final_path = os.path.join(final_path, dir)
-        return final_path
-    else:
-        return os.path.join(og_path, join)
+        return dos_path