Remove debug config snippets from launch.json

[DonJayamanne]

• Add pyramid into the existing debug config UI (done)
• Remove the snippets for debug config
• Snippets removed must be added into the VS Code recipes repo here:
  • https://github.com/Microsoft/vscode-recipes/tree/master/debugging%20python and linked to the docs here: (https://code.visualstudio.com/docs/python/debugging#_debugging-specific-app-types)
  • Just file an issue on VS Code docs site with details
• Update strings to match feedback

[ericsnowcurrently]

microsoft/vscode-docs#2573