Revert "feat: Initial generation of google-cloud-merchant-issue_resolution-v1…" (#30435)

This reverts commit 9b5c2b9.

Author: aandreassa

.release-please-manifest.json

@@ -489,8 +489,6 @@
   "google-cloud-memorystore-v1+FILLER": "0.0.0",
   "google-cloud-memorystore-v1beta": "0.6.0",
   "google-cloud-memorystore-v1beta+FILLER": "0.0.0",
-  "google-cloud-merchant-issue_resolution-v1beta": "0.0.1",
-  "google-cloud-merchant-issue_resolution-v1beta+FILLER": "0.0.0",
   "google-cloud-metastore": "2.0.1",
   "google-cloud-metastore+FILLER": "0.0.0",
   "google-cloud-metastore-v1": "2.1.0",