remove setup flutter step

Author: nickf2k

.github/workflows/firebase-hosting-merge.yml

@@ -11,10 +11,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - name: Set up Flutter
-        uses: subosito/flutter-action@v2
-        with:
-          flutter-version: '3.19.0'
       - run: flutter build web
       - uses: FirebaseExtended/action-hosting-deploy@v0
         with:

.github/workflows/firebase-hosting-pull-request.yml

@@ -9,12 +9,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-
-      - name: Set Up Flutter
-        uses: subosito/flutter-action@v2
-        with:
-          flutter-version: '3.19.0'
-          channel: 'stable'
       - run: flutter build web
       - uses: FirebaseExtended/action-hosting-deploy@v0
         with: