Update mantis-cli-pr-merge.yml

.github/workflows/mantis-cli-pr-merge.yml

@@ -1,18 +1,12 @@
 name: Mantis CLI MR/PR Release
 on:
-  pull_request:
-    branches:
-      - main
-    types:
-      - closed
   workflow_dispatch:
-
 env:
   REGISTRY: ghcr.io
   IMAGE_NAME: phonepe/mantis-upstream
 jobs:
   build-and-push-image:
-    if: (github.event_name == 'pull_request' && github.event.action == 'closed' && github.event.pull_request.merged == true) || github.event_name == 'workflow_dispatch'
+    if: github.event_name == 'workflow_dispatch'
     runs-on: ubuntu-latest
     permissions:
       contents: write