Update ci-testing.yml (#4772)

.github/workflows/ci-testing.yml

@@ -4,10 +4,10 @@ name: CI CPU testing
 
 on: # https://help.github.com/en/actions/reference/events-that-trigger-workflows
   push:
-    branches: [master, develop]
+    branches: [master]
   pull_request:
     # The branches below must be a subset of the branches above
-    branches: [master, develop]
+    branches: [master]
   schedule:
     - cron: '0 0 * * *'  # Runs at 00:00 UTC every day