Disable flake8 linting

The new version of Black generates formatting that flake8 disagrees with.  Ruff refuses to let you add noqa lines to disable flake8 checks if it feels that the noqa lines are unnecessary.  So one of the three tools has to go.

Author: dhirving

.github/workflows/lint.yaml

@@ -7,8 +7,6 @@ on:
   pull_request:
 
 jobs:
-  call-workflow:
-    uses: lsst/rubin_workflows/.github/workflows/lint.yaml@main
   ruff:
     runs-on: ubuntu-latest
     steps: