This reverts commit 47a0fa3d.

If a single function schema is provided for a Route, then we use OpenAIs inbuilt function calling to determine arguments from the utterance.

if more than one function schema is provided then we use our custom prompt.

The former is only supported from Python 3.10 onwards and we'd like to support Python 3.9 onwards.

list is only supported from Python 3.10 onwards, and we'd like to support 3.9 onwards.

See Notebook 02.