Update pull_request.yml

Author: ktoso

.github/workflows/pull_request.yml

@@ -44,7 +44,6 @@ jobs:
     # Workaround https://github.com/nektos/act/issues/1875
     uses: swiftlang/swift-java/.github/workflows/macos_tests.yml@wip-macos-ci
     with:
-      runner_pool: general
       build_scheme: SwiftJava-Package
 
   test-swift: