Update the flake8 pre-commit ignores (#2778)

* Remove additional ignores from flake8

* Remove all unused imports

* Remove all unused imports

* Update flake8 and pyupgrade

* F841, removed unused variables

* E731, removed lambda assignment to variables

* Remove E731, F403, F405, F524

* Remove E722, bare exceptions

* Remove E712, compare variable == True or == False to is True or is False

* Remove E402, module level import not at top of file

* Added --pre-file-ignores

* Add --per-file-ignores removing E741, E302 and E704

* Add E741, do not use variables named ‘l’, ‘O’, or ‘I’ to ignore issues in classic control

* Fixed issues for pytest==6.2

* Remove unnecessary # noqa

* Edit comment with the removal of E302

* Added warnings and declared module, attr for pyright type hinting

* Remove unused import

* Removed flake8 E302

* Updated flake8 from 3.9.2 to 4.0.1

* Remove unused variable

setup.py

@@ -6,7 +6,7 @@ from setuptools import find_packages, setup
 
 # Don't import gym module here, since deps may not be installed
 sys.path.insert(0, os.path.join(os.path.dirname(__file__), "gym"))
-from version import VERSION
+from version import VERSION  # noqa:E402
 
 # Environment-specific dependencies.
 extras = {