remove testing branch from main branch tests

Author: hannahkm

.github/workflows/main-branch-tests.yml

@@ -11,7 +11,6 @@ on:
     branches:
       - main
       - release-v*
-      - hannahkm/continue-on-error-multios
     tags-ignore:
       - 'contrib/**'
       - 'instrumentation/**'