Remove macos-13 pipeline

Author: fontanf

.github/workflows/build.yml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-13, macos-latest]
+        os: [ubuntu-latest, windows-latest, macos-latest]
         python-version: ["3.8"]
 
     steps: