Reverting some attempts

restrictedpython_code_eval.py

@@ -408,28 +408,16 @@ ALLOWED_SYS_NAMES = ['maxsize']
 class AllowListImporter:
     def __init__(self, allowed_imports: List[str]):
         self.allowed_imports = allowed_imports
-        sys_spec = importlib.util.find_spec('sys')
-        inner_sys = importlib.util.module_from_spec(sys_spec)  # type: ignore
-        sys_spec.loader.exec_module(inner_sys)  # type: ignore
-
-        for key in list(dir(inner_sys)):
-            if key not in ALLOWED_SYS_NAMES:
-                delattr(inner_sys, key)
-        self.inner_sys = inner_sys
-
+        
     def __call__(self, name, globals=None, locals=None, fromlist=(), level=0):
         if name.startswith('.'):
             raise ImportError("Relative imports are not allowed.")
         
         if '.' in name:
-            package_name, sub_name = name.split('.', 1)
+            package_name, _ = name.split('.', 1)
 
         else:
             package_name = name
-            sub_name = None
-
-        if package_name == 'sys':
-            return self.inner_sys
         
         if package_name in self.allowed_imports:
             return importlib.__import__(name, globals, locals, fromlist, level)