[skip ci] Purge cached index on jsDelivr

Reverts f3e86f75be. Related to https://github.com/tachiyomiorg/tachiyomi/issues/5517

.github/scripts/commit-repo.sh

@@ -9,6 +9,9 @@ if [ -n "$(git status --porcelain)" ]; then
     git add .
     git commit -m "Update extensions repo"
     git push
+
+    # Purge cached index on jsDelivr
+    curl https://purge.jsdelivr.net/gh/tachiyomiorg/tachiyomi-extensions@repo/index.min.json
 else
     echo "No changes to commit"
 fi