refactor: Remove mypy options from build workflow

Author: dhruvmanila

.github/workflows/build.yml

@@ -21,9 +21,7 @@ jobs:
         run: |
           python -m pip install --upgrade pip setuptools six wheel
           python -m pip install mypy pytest-cov -r requirements.txt
-      # FIXME: #4052 fix mypy errors in the exclude directories and remove them below
-      - run: mypy --ignore-missing-imports
-          --exclude '(data_structures|digital_image_processing|dynamic_programming|graphs|maths|matrix|other|project_euler|scripts|searches|strings*)/$' .
+      - run: mypy .
       - name: Run tests
         run: pytest --doctest-modules --ignore=project_euler/ --ignore=scripts/ --cov-report=term-missing:skip-covered --cov=. .
       - if: ${{ success() }}