Revert "feat: Add pull request trigger and link checker"

This reverts commit 3a6f016.

Author: neural-loop

.github/workflows/main.yml

@@ -3,8 +3,6 @@ name: Deploy Hugo site to Pages
 on:
   push:
     branches: ["main", "cache-images"]
-  pull_request: # Add this to run on pull requests
-    branches: ["main"]
 
 permissions:
   contents: read
@@ -139,37 +137,12 @@ jobs:
         with:
           path: ./public
 
-  link-checker:
-    runs-on: ubuntu-24.04
-    needs: build
-    steps:
-      - name: Download artifact
-        uses: actions/download-artifact@v4
-        with:
-          name: github-pages
-          path: ./public
-      - name: Link Checker
-        uses: lycheeverse/lychee-action@v1.11.0
-        with:
-          args: >-
-            --verbose
-            --exclude-mail
-            --exclude-all-private
-            --exclude 'https://www.linkedin.com/.*'
-            --exclude 'https://twitter.com/intent/.*'
-            --exclude 'https://github.com/open-neuromorphic/open-neuromorphic.github.io/issues/new/choose'
-            './**/*.html'
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-
   deploy:
     environment:
       name: github-pages
       url: ${{ steps.deployment.outputs.page_url }}
     runs-on: ubuntu-24.04
     needs: build
-    # Only deploy on pushes to the main branch, not on pull requests
-    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
     steps:
       - name: Deploy to GitHub Pages
         id: deployment