Updated macOS wheel workflow

.github/workflows/wheels.yml

@@ -97,44 +97,6 @@ jobs:
 
       - name: Build wheels for CPython Mac OS
         run: |
-          # Make sure to use a libomp version binary compatible with the oldest
-          # supported version of the macos SDK as libomp will be vendored into
-          # the scikit-image wheels for macos. The list of binaries are in
-          # https://packages.macports.org/libomp/.  Currently, the oldest
-          # supported macos version is: High Sierra / 10.13. When upgrading
-          # this, be sure to update the MACOSX_DEPLOYMENT_TARGET environment
-          # variable accordingly. Note that Darwin_17 == High Sierra / 10.13.
-          #
-          # We need to set both MACOS_DEPLOYMENT_TARGET and MACOSX_DEPLOYMENT_TARGET
-          # until there is a new release with this commit:
-          # https://github.com/mesonbuild/meson-python/pull/309
-          if [[ "$CIBW_ARCHS_MACOS" == arm64 ]]; then
-              # SciPy requires 12.0 on arm to prevent kernel panics
-              # https://github.com/scipy/scipy/issues/14688
-              # so being conservative, we just do the same here
-              export MACOSX_DEPLOYMENT_TARGET=12.0
-              export MACOS_DEPLOYMENT_TARGET=12.0
-              OPENMP_URL="https://anaconda.org/conda-forge/llvm-openmp/11.1.0/download/osx-arm64/llvm-openmp-11.1.0-hf3c4609_1.tar.bz2"
-          else
-              export MACOSX_DEPLOYMENT_TARGET=10.9
-              export MACOS_DEPLOYMENT_TARGET=10.9
-              OPENMP_URL="https://anaconda.org/conda-forge/llvm-openmp/11.1.0/download/osx-64/llvm-openmp-11.1.0-hda6cdc1_1.tar.bz2"
-          fi
-          echo MACOSX_DEPLOYMENT_TARGET=${MACOSX_DEPLOYMENT_TARGET}
-          echo MACOS_DEPLOYMENT_TARGET=${MACOS_DEPLOYMENT_TARGET}
-
-          # use conda to install llvm-openmp
-          # Note that we do NOT activate the conda environment, we just add the
-          # library install path to CFLAGS/CXXFLAGS/LDFLAGS below.
-          sudo conda create -n build $OPENMP_URL
-          PREFIX="/usr/local/miniconda/envs/build"
-          export CC=/usr/bin/clang
-          export CXX=/usr/bin/clang++
-          export CPPFLAGS="$CPPFLAGS -Xpreprocessor -fopenmp"
-          export CFLAGS="$CFLAGS -Wno-implicit-function-declaration -I$PREFIX/include"
-          export CXXFLAGS="$CXXFLAGS -I$PREFIX/include"
-          export LDFLAGS="$LDFLAGS -Wl,-S -Wl,-rpath,$PREFIX/lib -L$PREFIX/lib -lomp"
-
           python -m cibuildwheel --output-dir dist
         env:
           CIBW_BUILD: ${{ matrix.cibw_python }}