remove collaborator

Author: hlshen

.github/workflows/release-vscode-ext.yaml

@@ -16,7 +16,6 @@ jobs:
       startsWith(github.event.comment.body, '/run-release') &&
       (github.event.comment.author_association == 'OWNER' ||
        github.event.comment.author_association == 'MEMBER' ||
-       github.event.comment.author_association == 'COLLABORATOR')
     runs-on: ubuntu-latest
     steps:
       - name: Trigger Kokoro via API