Remove flake8-mypy configurations

See #550

Author: Benjamin Gorman

setup.cfg

@@ -45,15 +45,6 @@ ignore =
     E203,E305,E402,E501,E721,E741,F403,F405,F821,F841,F999,W503,W504,C408,E302,W291,E303,
     # N812 lowercase 'torch.nn.functional' imported as non lowercase 'F'
     N812
-    # suppress flake8-mypy failures occuring when MYPYPATH=${src_dir}/monai/monai
-    T499
-# --- Temporary disabling to allow smaller PRs
-# Subsequent fixes necessary to make this tool pass are not yet
-# merged into the master branch, but requested as separate
-# commits.  Can not enable until all outstanding typehint
-# PR's are approved
-    T484
-# ^^^^^^^^^ Temporary disabling to allow smaller PRs
 per-file-ignores = __init__.py: F401
 exclude = *.pyi,.git,monai/_version.py,versioneer.py,venv, _version.py