unify on single job

.github/workflows/release-notes.yaml

diff --git a/.github/workflows/release-notes.yaml b/.github/workflows/release-notes.yaml
index b2d298e..aba8906 100644
--- a/.github/workflows/release-notes.yaml
+++ b/.github/workflows/release-notes.yaml
@@ -55,19 +55,9 @@
             echo "::error file=$CURRENT_RELEASE_JSON_FILE_PATH,line=0,col=0,endColumn=0,title='Release Notes Weren\'t Modified'::Please add a release note entry or a reason to your description using: \`> NO RELEASE NOTE CHANGES: [reason goes here]\`"
             exit 1
           fi
-
-  validation-stuff:
-    runs-on: ubuntu-latest
-    name: Validate Release Note File
-    steps:
-      - name: Get Pull Request Number
-        id: get-pull-request-number
-        run: |
-          PULL_REQUEST_NUMBER=$(jq --raw-output .pull_request.number "$GITHUB_EVENT_PATH")
-          echo "::set-output name=PULL_REQUEST_NUMBER::$PULL_REQUEST_NUMBER"
       - uses: dart-lang/setup-dart@9a04e6d73cca37bd455e0608d7e5092f881fd603
-      - uses: actions/checkout@v3
-      - name: Verify the release note integrity
+        name: Setup Dart
+      - name: Verify the release note content
         run: |
           cd tool/
           dart pub get
@@ -82,11 +72,3 @@
           dart ./release_note_helper.dart pr-url \
             -f "../$CURRENT_RELEASE_JSON_FILE_PATH" \
             -u https://github.com/flutter/devtools/pull/$PULL_NUMBER 
-
-      # - name: Add PR Url to Release Notes
-      #   run: 
-      # - name: Verify release_notes.json integrity
-      #   run: 
-
-          
-