Merge pull request #4552 from github/jm_fix_removed_repo

fix: removed repo causes collection to fail on import in biztools

Author: jmeridth

collections/pixel-art-tools/index.md

@@ -14,7 +14,6 @@ items:
  - rgab1508/PixelCraft
  - PixiEditor/PixiEditor
  - Kully/pixel-paint
- - pulkomandy/grafx2/
  - pixa-pics/pixa-pics.github.io
 display_name: Pixel Art Tools
 created_by: leereilly