Remove CodeRabbit workflow

This removes the CodeRabbit review workflow as it's no longer needed.

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

.github/workflows/coderabbit-review.yml

@@ -1,16 +0,0 @@
----
-name: Trigger CodeRabbit for Bot PRs
-on:
-  pull_request_target:
-    types: [opened]
-
-permissions:
-  contents: write
-  pull-requests: write
-
-jobs:
-  trigger-review:
-    uses: submariner-io/submariner-bot/.github/workflows/coderabbit-trigger.yml@devel
-    with:
-      pr_number: ${{ github.event.pull_request.number }}
-    secrets: inherit