ci: Just remove big-sur build, which can't be used anymore

.github/workflows/ci.yml

@@ -41,8 +41,8 @@ jobs:
             .github/workflows/generic-build.sh ${{ matrix.arch }}
 
   build-osx:
-    name: Build and test OSX executable (macOS-latest)
-    runs-on: macOS-latest
+    name: Build and test OSX executable (macos-latest)
+    runs-on: macos-latest
     env:
       CC: clang
       CXX: clang++
@@ -61,31 +61,6 @@ jobs:
           sudo .github/workflows/ci-run-tests.sh
 
 
-  build-osx-big-sur:
-    if: false
-    name: Build and test OSX executable (Big Sur)
-    runs-on: macOS-11
-    env:
-      CC: clang
-      CXX: clang++
-
-    steps:
-      - uses: maxim-lobanov/setup-xcode@v1
-        with:
-          xcode-version: '11.7.0'
-
-      - uses: actions/checkout@v2
-
-      - name: Prepare
-        run: |
-          chmod u+x .github/workflows/osx-build.sh .github/workflows/ci-run-tests.sh
-          brew install zlib bash cmake pkgconfig [email protected] [email protected] dwarfutils
-
-      - name: Build for OSX
-        run: |
-          sudo .github/workflows/osx-build.sh
-          sudo .github/workflows/ci-run-tests.sh
-
   build-freebsd:
     runs-on: macos-12
     name: Build and test FreeBSD executable