Remove darwin-x64 prebuild (macos-13 unavailable in GitHub workflow)

Author: guimard

.github/workflows/ci.yml

@@ -62,8 +62,6 @@ jobs:
         include:
           - os: ubuntu-latest
             target: linux-x64
-          - os: macos-latest
-            target: darwin-x64
           - os: macos-14
             target: darwin-arm64
     runs-on: ${{ matrix.os }}