chore: use def import_module from importlib

There is no reason to implement it.

Author: nijel

social_core/utils.py

@@ -5,9 +5,9 @@
 import hmac
 import logging
 import re
-import sys
 import time
 import unicodedata
+from importlib import import_module
 from typing import TYPE_CHECKING, Any
 from urllib.parse import parse_qs as battery_parse_qs
 from urllib.parse import unquote, urlencode, urlparse, urlunparse
@@ -36,11 +36,6 @@
 social_logger = logging.getLogger("social")
 
 
-def import_module(name):
-    __import__(name)
-    return sys.modules[name]
-
-
 def module_member(name):
     mod, member = name.rsplit(".", 1)
     module = import_module(mod)