Give up on msys2 on CI

.github/workflows/build.yml

@@ -24,40 +24,6 @@ jobs:
       - name: make
         run: make -j $(sysctl -n hw.logicalcpu)
 
-  msys2-i686:
-    runs-on: windows-latest
-    defaults:
-      run:
-        shell: msys2 {0}
-    steps:
-      - uses: actions/checkout@v2
-      - uses: msys2/setup-msys2@v2
-        with:
-          msystem: mingw32
-          install: base-devel make mingw-w64-i686-toolchain mingw-w64-i686-libsndfile mingw-w64-i686-pkg-config mingw-w64-i686-python-pyqt5
-          # FIXME mingw-w64-i686-fluidsynth mingw-w64-i686-liblo
-      - name: make features
-        run: make features
-      - name: make
-        run: make
-
-  msys2-x86_64:
-    runs-on: windows-latest
-    defaults:
-      run:
-        shell: msys2 {0}
-    steps:
-      - uses: actions/checkout@v2
-      - uses: msys2/setup-msys2@v2
-        with:
-          msystem: mingw64
-          install: base-devel make mingw-w64-x86_64-toolchain mingw-w64-x86_64-libsndfile mingw-w64-x86_64-pkg-config mingw-w64-x86_64-python-pyqt5
-          # FIXME mingw-w64-x86_64-fluidsynth mingw-w64-x86_64-liblo
-      - name: make features
-        run: make features
-      - name: make
-        run: make -j $(nproc)
-
   ubuntu-18_04:
     runs-on: ubuntu-18.04
     steps: