Remove Mac/Windows runners

Author: trowski

.github/workflows/ci.yml

@@ -25,15 +25,6 @@ jobs:
           - operating-system: 'ubuntu-latest'
             php-version: '8.5'
 
-          - operating-system: 'windows-latest'
-            php-version: '8.5'
-            job-description: 'on Windows'
-
-          - operating-system: 'macos-latest'
-            php-version: '8.5'
-            job-description: 'on macOS'
-
-
     name: PHP ${{ matrix.php-version }} ${{ matrix.job-description }}
 
     runs-on: ${{ matrix.operating-system }}