Remove python.defaultInterpreterPath setting (no longer necessary)

Author: cdebonnel

.vscode/settings.json

@@ -16,7 +16,6 @@
     },
     "files.trimFinalNewlines": true,
     "files.trimTrailingWhitespace": true,
-    "python.defaultInterpreterPath": "${env:PPSTACK_PYTHONEXE}",
     "editor.formatOnSave": true,
     "python.analysis.autoFormatStrings": true,
     "python.testing.unittestEnabled": false,

doc/dev/contribute.rst

@@ -97,7 +97,7 @@ Some parameters are required to be set before using the project from within
 Visual Studio Code (used in `launch.json` and `tasks.json`). These are:
 
 * ``PPSTACK_PYTHONEXE``: The path to the Python interpreter to use. This is
-  used to launch the application from within Visual Studio Code. If not set,
+  used to run tasks from within Visual Studio Code. If not set,
   the default Python interpreter will be used.
 
 * `.env` file: This file is used to set environment variables for the