Remove python versions temporarly

WSAA test are failing SoapFault: ns1:coe.alreadyAuthenticated
(we need to use VCR to record and replay traffic)

Signed-off-by: Mariano Reingart <[email protected]>

Author: reingart

.github/workflows/python-package.yml

@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [2.7, 3.7, 3.8, 3.9]
+        python-version: [2.7, 3.9]
 
     steps:
     - uses: actions/checkout@v2