Disable nasty Windows for juniper_integration_tests on CI

Author: tyranron

.github/workflows/ci.yml

@@ -193,10 +193,6 @@ jobs:
           # TODO: LLVM ERROR: out of memory
           - crate: juniper_integration_tests
             os: windows
-            toolchain: beta
-          - crate: juniper_integration_tests
-            os: windows
-            toolchain: nightly
 
     runs-on: ${{ matrix.os }}-latest
     steps: