Address comment.

Author: lvyanquan

.github/workflows/flink_cdc_ci.yml

@@ -22,13 +22,6 @@ on:
     paths-ignore:
       - 'docs/**'
       - 'README.md'
-  pull_request:
-    branches:
-      - master
-      - release-*
-    paths-ignore:
-      - 'docs/**'
-      - 'README.md'
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.event.number || github.run_id }}