Remove MacOS

Author: jchristopherson

.github/workflows/fpm.yml

@@ -8,15 +8,12 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, macos-latest]
+        os: [ubuntu-latest]
         gcc_v: [10] # Version of GFortran we want to use.
         include:
         - os: ubuntu-latest
           os-arch: linux-x86_64
 
-        - os: macos-latest
-          os-arch: macos-x86_64
-
     env:
       FC: gfortran
       GCC_V: ${{ matrix.gcc_v }}