Remove mypy_primer (#4795)

Co-authored-by: hauntsaninja <>

.github/workflows/mypy_primer.yml

@@ -1,57 +0,0 @@
-name: Run mypy_primer
-
-on:
-  # Only run on PR, since we diff against master
-  # pull_request_target gives us access to a write token
-  pull_request_target:
-
-jobs:
-  mypy_primer:
-    name: Run mypy_primer
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-        with:
-          path: typeshed_to_test
-          fetch-depth: 0
-          # pull_request_target checks out the PR base branch by default
-          ref: refs/pull/${{ github.event.pull_request.number }}/merge
-      - uses: actions/setup-python@v2
-        with:
-          python-version: 3.8
-      - name: Install dependencies
-        run: |
-          python -m pip install -U pip
-          pip install git+https://github.com/hauntsaninja/mypy_primer.git
-      - name: Run mypy_primer
-        shell: bash
-        run: |
-          cd typeshed_to_test
-          echo "new commit"
-          COMMIT=$(git rev-parse HEAD)
-          git rev-list --format=%s --max-count=1 $COMMIT
-          git checkout -b upstream_master origin/master
-          echo "base commit"
-          git rev-list --format=%s --max-count=1 upstream_master
-          echo ''
-          cd ..
-          ( mypy_primer --new 0.790 --old 0.790 --custom-typeshed-repo typeshed_to_test --new-typeshed $COMMIT --old-typeshed upstream_master -o concise | tee diff.txt ) || [ $? -eq 1 ]
-      - name: Post comment
-        uses: actions/github-script@v3
-        with:
-          github-token: ${{secrets.GITHUB_TOKEN}}
-          script: |
-            const fs = require('fs').promises;
-            try {
-              data = await fs.readFile('diff.txt', 'utf-8')
-              if (data.trim()) {
-                await github.issues.createComment({
-                  issue_number: context.issue.number,
-                  owner: context.repo.owner,
-                  repo: context.repo.repo,
-                  body: 'Diff from [mypy_primer](https://github.com/hauntsaninja/mypy_primer), showing the effect of this PR on open source code:\n```diff\n' + data + '```'
-                })
-              }
-            } catch (error) {
-              console.log(error)
-            }