Remove windows os from min req tests (#1101)

Summary:
This caused issue with unix shell specific commands. We don't need to test this on windows, so we can just remove this.

Pull Request resolved: #1101

Reviewed By: saitcakmak

Differential Revision: D34524483

Pulled By: Balandat

fbshipit-source-id: 9ee2270a0e9bba4398b17c32cbb74539df2793b8

Author: Balandat

.github/workflows/test_stable.yml

@@ -60,7 +60,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: ["ubuntu-latest", "macos-latest", "windows-latest"]
+        os: ["ubuntu-latest", "macos-latest"]
         python-version: [3.7, 3.9]
     steps:
     - uses: actions/checkout@v2