Remove Windows cross-compilation from CI

.github/workflows/ci.yml

@@ -126,8 +126,6 @@ jobs:
           - linux-x86_64-dyn
           - android-arm
           - android-arm64
-          - win32-static
-          - win32-dyn
         include:
           - target: linux-x86_64-static
             image_variant: focal
@@ -153,18 +151,6 @@ jobs:
             arch_name: aarch64-linux-android
             run_test: false
             coverage: false
-          - target: win32-static
-            image_variant: f35
-            lib_postfix: '64'
-            arch_name: i686-w64-mingw32
-            run_test: false
-            coverage: false
-          - target: win32-dyn
-            image_variant: f35
-            lib_postfix: '64'
-            arch_name: i686-w64-mingw32
-            run_test: false
-            coverage: false
     env:
       HOME: /home/runner
     runs-on: ubuntu-20.04