Revert "Add action to label size of PR" (#13325)

.github/workflows/size-label.yml

@@ -1,11 +0,0 @@
-name: size-label
-on: pull_request
-jobs:
-  size-label:
-    runs-on: ubuntu-latest
-    steps:
-      - name: size-label
-        uses: "pascalgn/size-label-action@v0.2.3"
-        env:
-          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
-          IGNORED: "**/files.wxs"