Remove redundant Windows generators jobs

Author: PatKamin

.github/workflows/nightly.yml

@@ -96,15 +96,14 @@ jobs:
     name: Windows ${{matrix.generator}} generator
     strategy:
       matrix:
-        os: ['windows-2019', 'windows-2022']
         build_type: [Debug, Release]
         compiler: [{c: cl, cxx: cl}]
         shared_library: ['ON', 'OFF']
         static_hwloc: ['ON', 'OFF']
         generator: ['Ninja', 'NMake Makefiles']
         umfd_lib: ['ON', 'OFF']
 
-    runs-on: ${{matrix.os}}
+    runs-on: windows-latest
 
     steps:
     - name: Checkout