remove outdated macos runner

Author: OptimumCode

.github/workflows/benchmark.yml

@@ -56,8 +56,6 @@ jobs:
             additional-task: ":benchmark:${{ github.event.pull_request.number && 'jvmPrValidationComparisonBenchmark' || 'jvmComparisonBenchmark' }}"
           - os: macos-latest
             additional-task: "-x :benchmark:${{ github.event.pull_request.number && 'jvmPrValidationBenchmark' || 'jvmBenchmark' }}"
-          - os: macos-13 # for macosX64
-            additional-task: "-x :benchmark:${{ github.event.pull_request.number && 'jvmPrValidationBenchmark' || 'jvmBenchmark' }}"
           - os: windows-latest
             additional-task: "-x :benchmark:${{ github.event.pull_request.number && 'jvmPrValidationBenchmark' || 'jvmBenchmark' }}"
     runs-on: ${{ matrix.os }}