Remove ref parameter from workflows

.github/workflows/build-vscode-extension.yml

@@ -12,11 +12,6 @@ on:
         required: false
         type: string
         default: snapshot
-      ref:
-        description: Git branch, tag, commit hash
-        required: false
-        default: 'main'
-        type: string
 
 permissions:
   contents: write
@@ -28,8 +23,6 @@ jobs:
     steps:
       - name: Checkout vscode-extensions code and workflow scripts
         uses: actions/checkout@v4
-        with:
-          ref: ${{ inputs.ref }}
       - name: Set up JDK 17
         uses: actions/setup-java@v4
         with: