make simpler

Author: subosito

.github/workflows/workflow.yml

@@ -19,7 +19,7 @@ jobs:
     strategy:
       matrix:
         operating-system: [ubuntu-latest, windows-latest, macos-latest]
-        channel: [stable, beta, master]
+        channel: [stable, beta]
     steps:
     - uses: actions/checkout@v3
     - id: flutter-action