ci: Remove eslint diff plugin. Run full linting on PRs (no-changelog) (#7175)

.github/workflows/ci-pull-requests.yml

@@ -67,10 +67,5 @@ jobs:
           path: ./packages/**/dist
           key: ${{ github.sha }}-base:18-test-lint
 
-      - name: Fetch base branch for `git diff`
-        run: git fetch origin ${{ github.event.pull_request.base.ref }}:${{ github.event.pull_request.base.ref }}
-
-      - name: Run ESLint on changes only
-        env:
-          ESLINT_PLUGIN_DIFF_COMMIT: ${{ github.event.pull_request.base.ref }}
+      - name: Lint
         run: pnpm lint