Remove meaningless `@functools.wraps`

importhook/__init__.py

@@ -68,7 +68,6 @@ def on_import(module_name, func=None):
         importhook.on_import('httplib', on_httplib_import)
     """
     if func is None:
-        @functools.wraps(func)
         def decorator(func):
             registry[module_name] = func
             return func