Update build.yml

Author: ntkme

.github/workflows/build.yml

@@ -46,14 +46,6 @@ jobs:
           python3 sdk/tools/generate_package_config.py
           python3 sdk/tools/generate_sdk_version_file.py
 
-      - name: Patch Dart SDK 3.1.0-189.0.dev
-        if: inputs.ref == '3.1.0-189.0.dev'
-        run: |
-          cd dart-sdk/sdk
-          xargs -n 1 -- sh -xc 'curl -fsSL "https://github.com/dart-lang/sdk/commit/$1.diff" | git apply -' -- <<'EOF'
-            99c68b013bab3c574abe300d710d5bdf8f111c10
-          EOF
-
       - name: Patch Dart SDK 3.0
         run: |
           cd dart-sdk/sdk