tools: remove flake8-bandit

this hasn't even been configured, so its not doing anything whatsoever
as far as I can tell

Author: onerandomusername

poetry.lock

@@ -34,7 +34,6 @@ taskipy = "^1.6.0"
 black = "^21.7b0"
 flake8 = "~=3.8"
 flake8-annotations = "~=2.3"
-flake8-bandit = "^2.1.2"
 flake8-bugbear = "~=20.1"
 flake8-docstrings = "~=1.5"
 flake8-isort = "^4.0.0"