Remove python 3.5 from python linter

Author: cscarpitta

.github/workflows/python_linter.yml

@@ -35,7 +35,7 @@ jobs:
     ###################
     strategy:
       matrix:
-        python-version: [3.5, 3.6, 3.7, 3.8]
+        python-version: [3.6, 3.7, 3.8]
 
     ##################
     # Load all steps #