Remove push trigger

.github/workflows/main.yml

@@ -18,8 +18,6 @@ env:
 
 # This runs every day on 1801 UTC
 on:
-  # Or on push, if for mirror it runs on workflow setup and changes
-  push:
   schedule:
     - cron: '1 18 * * *'
   # Allows manual workflow run (must in default branch to work)