Remove auto-merge from CodeRabbit workflow

Since the webhook bot now handles auto-merge for all bot PRs
(Dependabot, Konflux, and submariner-bot), this commit removes
the duplicate auto-merge functionality from the CodeRabbit trigger
workflow.

Signed-off-by: Tom Pantelis <tompantelis@gmail.com>

Author: tpantelis

.github/workflows/coderabbit-trigger.yml

@@ -10,7 +10,7 @@ on:
 jobs:
   trigger-coderabbit:
     runs-on: ubuntu-latest
-    if: github.actor == 'dependabot[bot]' || github.actor == 'submariner-bot' || github.actor == 'red-hat-konflux-kflux-prd-rh02[bot]'
+    if: github.actor == 'dependabot[bot]' || github.actor == 'submariner-bot'
     permissions:
       contents: write
       pull-requests: write
@@ -30,31 +30,3 @@ jobs:
               body: triggerComment
             });
             console.log('CodeRabbit review comment posted.');
-
-            // Enable auto-merge
-            const pr = await github.rest.pulls.get({
-              owner,
-              repo,
-              pull_number: issue_number
-            });
-
-            try {
-              await github.graphql(`
-                mutation($pullRequestId: ID!) {
-                  enablePullRequestAutoMerge(input: {
-                    pullRequestId: $pullRequestId,
-                    mergeMethod: REBASE
-                  }) {
-                    pullRequest {
-                      id
-                    }
-                  }
-                }
-              `, {
-                pullRequestId: pr.data.node_id
-              });
-              console.log('Auto-merge enabled with rebase method.');
-            } catch (error) {
-              console.error('Failed to enable auto-merge:', error.message);
-              throw error;
-            }