ci: remove iOS builds

These aren't released and haven't been tested thoroughly. macOS GitHub
Actions runners slow down the CI for this project and this annoys me.
The addition of 3.11 builds is going to make the situation worse. So
let's just disable the iOS builds from CI to keep CI responsive.

Author: indygreg

.github/workflows/apple.yml

@@ -114,30 +114,6 @@ jobs:
           - target_triple: 'x86_64-apple-darwin'
             py: 'cpython-3.10'
             optimizations: 'pgo+lto'
-
-          # iOS targeting mobile hardware. Can't do PGO during cross-compiles.
-          # Can't cross-compile until Python 3.9.
-          - target_triple: 'aarch64-apple-ios'
-            py: 'cpython-3.9'
-            optimizations: 'debug'
-          - target_triple: 'aarch64-apple-ios'
-            py: 'cpython-3.9'
-            optimizations: 'noopt'
-          - target_triple: 'aarch64-apple-ios'
-            py: 'cpython-3.9'
-            optimizations: 'lto'
-
-          # iOS targeting simulator. Can't do PGO during cross-compiles.
-          # Can't cross-compile until Python 3.9.
-          - target_triple: 'x86_64-apple-ios'
-            py: 'cpython-3.9'
-            optimizations: 'debug'
-          - target_triple: 'x86_64-apple-ios'
-            py: 'cpython-3.9'
-            optimizations: 'noopt'
-          - target_triple: 'x86_64-apple-ios'
-            py: 'cpython-3.9'
-            optimizations: 'lto'
     needs:
       - pythonbuild
     runs-on: 'macos-11'