ci: disable block-internal-prs for fork workflow

We use PRs for human review before merging in our fork.

.github/workflows/block-internal-prs.yml

@@ -1,51 +0,0 @@
-name: Block Internal PRs
-
-on:
-  pull_request:
-    types: [opened, reopened]
-
-jobs:
-  block-internal-prs:
-    name: Block Internal PRs
-    # Only run if PR is from the same repo (not a fork)
-    if: github.event.pull_request.head.repo.full_name == github.repository
-    runs-on: ubuntu-latest
-    steps:
-      - name: Close PR and comment
-        uses: actions/github-script@v7
-        with:
-          script: |
-            const prNumber = context.issue.number;
-            const branch = context.payload.pull_request.head.ref;
-
-            const body = [
-              '**Internal PRs are not allowed.**',
-              '',
-              'Gas Town agents push directly to main. PRs are for external contributors only.',
-              '',
-              'To land your changes:',
-              '```bash',
-              'git checkout main',
-              'git merge ' + branch,
-              'git push origin main',
-              'git push origin --delete ' + branch,
-              '```',
-              '',
-              'See CLAUDE.md: "Crew workers push directly to main. No feature branches. NEVER create PRs."'
-            ].join('\n');
-
-            await github.rest.issues.createComment({
-              owner: context.repo.owner,
-              repo: context.repo.repo,
-              issue_number: prNumber,
-              body: body
-            });
-
-            await github.rest.pulls.update({
-              owner: context.repo.owner,
-              repo: context.repo.repo,
-              pull_number: prNumber,
-              state: 'closed'
-            });
-
-            core.setFailed('Internal PR blocked. Push directly to main instead.');