Remove macos13

Author: stevencl840

.github/workflows/ci.yml

@@ -39,18 +39,8 @@ jobs:
     strategy:
       matrix:
         arch: [ x64 ]
-        os: [ windows-2022, macos-13 ]
+        os: [ windows-2022 ]
         tfm: [ net472, net6.0, net8.0, net9.0 ]
-        exclude:
-          - os: macos-13
-            tfm: net472
-        include:
-          - arch: arm64
-            os: macos-14
-            tfm: net8.0
-          - arch: arm64
-            os: macos-14
-            tfm: net9.0
       fail-fast: false
     steps:
       - name: Checkout