Do not test with python 2.7

actions/setup-python#672

Author: laurynas-convertapi

.github/workflows/main.yml

@@ -6,7 +6,6 @@ jobs:
     strategy:
       matrix:
         python-version:
-          - '2.7'
           - '3.7'
           - '3.9'
     name: Python ${{ matrix.python-version }} sample