Remove deprecated pythonPath from VSCode settings

This has been deprecated for precisely the reason I've been struggling with it: it doesn't work having the same value on different systems.

See: 
* <https://github.com/microsoft/vscode-python/wiki/AB-Experiments>
* <https://devblogs.microsoft.com/python/python-in-visual-studio-code-may-2020-release>
* <microsoft/vscode-python#11015>

Author: mattachu

.vscode/global-settings.json

@@ -76,7 +76,6 @@
             "label": "WSL bash"
         }
     ],
-    "python.pythonPath": "/Users/matt/.pyenv/shims/python",
     "git.autofetch": true,
     "git.confirmSync": false,
     "[markdown]": {

.vscode/settings.json

@@ -6,7 +6,6 @@
         "**/.pytest_cache": true,
         ".pytest_cache/**/*": true
     },
-    "python.pythonPath": "~/.pyenv/versions/scripts/bin/python",
     "python.testing.pytestEnabled": true,
     "python.testing.unittestEnabled": false,
     "python.testing.nosetestsEnabled": false,