use existing patch extension register instead of iterating over poten…

…tials

could use something like "".join(file.rpartition(".")[1:]) if we still don't want os loaded
also i left in the iteration option in case there's an edge case I don't know about, tested a bizhawk game without it and had no issue

worlds/Files.py

@@ -14,7 +14,6 @@
 semaphore = threading.Semaphore(os.cpu_count() or 4)
 
 del threading
-del os
 
 
 class AutoPatchRegister(abc.ABCMeta):
@@ -33,6 +32,9 @@ def __new__(mcs, name: str, bases: Tuple[type, ...], dct: Dict[str, Any]) -> Aut
 
     @staticmethod
     def get_handler(file: str) -> Optional[AutoPatchRegister]:
+        _, suffix = os.path.splitext(file)
+        if suffix in AutoPatchRegister.file_endings:
+            return AutoPatchRegister.file_endings[suffix]
         for file_ending, handler in AutoPatchRegister.file_endings.items():
             if file.endswith(file_ending):
                 return handler