Remove 'dev-v3' from workflow triggers

Removed 'dev-v3' branch from push and pull request triggers.

Author: NirajC-Microsoft

.github/workflows/test.yml

@@ -5,7 +5,6 @@ on:
     branches:
       - main
       - dev
-      - dev-v3
       - demo
       - hotfix
   pull_request:
@@ -18,7 +17,6 @@ on:
       - main
       - main
       - dev
-      - dev-v3
       - demo
       - hotfix