modify scratch job

.github/workflows/branch-scratch.yml

@@ -3,21 +3,8 @@ name: Scratch
 
 on:
   workflow_dispatch:
-    inputs:
-      tag:
-        description: tag
-        required: true
 
 jobs:
-  get-short-tag:
-    id: get-short-tag
-    runs-on: ubuntu-latest
-    steps:
-      - name: save short tag to environment
-        run: echo "short_tag=$(echo ${{ github.event.inputs.tag }} | head -c 8 )" >> $GITHUB_ENV
-      - name: echo env var
-        run: echo "${{ github.env.short_tag }}"
-
   build:
     runs-on: ubuntu-latest
     permissions: