CI: windows has some issues, that should be addressed in the other PR

.github/workflows/ci.yml

@@ -27,7 +27,7 @@ jobs:
         - nightly-arm
         - macos
         # - win-msvc
-        - win-gnu
+        # - win-gnu
         include:
         #- build: stable
         #  os: ubuntu-18.04
@@ -50,15 +50,15 @@ jobs:
         # - build: win-msvc
         #   os: windows-2019
         #   rust: nightly
-        - build: win-gnu
+        # - build: win-gnu
-          os: windows-2019
+        #   os: windows-2019
-          rust: nightly-x86_64-gnu
+        #   rust: nightly-x86_64-gnu
     steps:
     - name: Checkout repository
       uses: actions/checkout@v2
 
-    - name: Install packages (Ubuntu and Windows)
+    - name: Install packages (Ubuntu)
-      if: matrix.os == 'ubuntu-18.04' || matrix.os == 'windows-2019'
+      if: matrix.os == 'ubuntu-18.04'
       run: |
         ci/ubuntu-install-packages