Turn off MacOS CI

Something in Homebrew has broken it and I cannot
find the solution.

Signed-off-by: Ralph Castain <rhc@pmix.org>

.github/workflows/builds.yaml

@@ -3,44 +3,6 @@ name: Build tests
 on: [pull_request]
 
 jobs:
-  macos:
-    runs-on: macos-latest
-    strategy:
-      matrix:
-        path: ['non-vpath', 'vpath']
-        sphinx: ['no-sphinx', 'sphinx']
-    steps:
-    - name: Install dependencies
-      run: brew install libevent hwloc autoconf automake libtool
-    - name: Git clone OpenPMIx
-      uses: actions/checkout@v3
-      with:
-            submodules: recursive
-    - name: Build OpenPMIx
-      run: |
-        ./autogen.pl
-
-        sphinx=
-        if test "${{ matrix.sphinx }}" = sphinx; then
-            pip3 install -r docs/requirements.txt
-            sphinx=--enable-sphinx
-        fi
-
-        c=./configure
-        if test "${{ matrix.path }}" = vpath; then
-            mkdir build
-            cd build
-            c=../configure
-        fi
-
-        $c --prefix=${PWD}/install $sphinx
-        make -j
-        cd test
-        make check
-        cd ..
-        make install
-        make uninstall
-
   ubuntu:
     runs-on: ubuntu-latest
     strategy: