add vulture to static analysis suite

Author: vedant-asati

setup.cfg

@@ -183,6 +183,7 @@ lint =
     flake8-docstrings==1.7.0
     flake8-spellcheck==0.28.0
     flake8-unused-arguments==0.0.13
+    vulture==2.14.0
 
 tools =
     platformdirs>=4.2,<5

tox.ini

@@ -14,6 +14,7 @@ commands =
     flake8 src tests setup.py
     mypy src tests setup.py --exclude "tests/fixtures/*" --namespace-packages
     ethereum-spec-lint
+    vulture src tests setup.py --exclude "*/tests/fixtures/*" --min-confidence 100
 
 [testenv:py3]
 extras =