Update Invalidations.yml

Author: DilumAluthge

.github/workflows/Invalidations.yml

@@ -36,10 +36,6 @@ jobs:
         test_script: 'import Example'
         package_name: 'Example'
 
-    - uses: actions/checkout@v3
-      with:
-        ref: ${{ github.event.repository.default_branch }}
-    - uses: julia-actions/julia-buildpkg@v1
     # - uses: julia-actions/julia-invalidations@v1
     - uses: ./
       id: invs_default