[CodeStyle][F522] Update .flake8 config (#47287)

* update .flake8 config: remove F522, test=document_fix

* test=document_fix

.flake8

@@ -23,7 +23,6 @@ ignore =
 
     # F, see https://flake8.pycqa.org/en/latest/user/error-codes.html
     F405,
-    F522,
     F811,F821,F841,
 
     # W, see https://pycodestyle.pycqa.org/en/latest/intro.html#error-codes