Use Python vscode extension for flake8 linting (#5492)

.vscode/extensions.json

@@ -5,7 +5,6 @@
         "dzannotti.vscode-babel-coloring",
         "esbenp.prettier-vscode",
         "donjayamanne.python",
-        "jaysonsantos.vscode-flake8",
         "dbaeumer.vscode-eslint"
     ]
 }

.vscode/settings.json

@@ -16,5 +16,8 @@
 
     "[javascript]": {
         "editor.formatOnSave": true
-    }
+    },
+
+    "python.linting.pylintEnabled": false,
+    "python.linting.flake8Enabled": true
 }