Dev Proxy Start command attempts to start Dev Proxy using active file

[garrytrinder]

Steps to reproduce

1. Create a file and add some contents, for example http file with some requests.
2. Open command palette, execute Dev Proxy Toolkit: Start command

Error

Command 'Dev Proxy Toolkit: Start' resulted in an error

Unexpected symbol <G> at 1:1
1 | GET https://jsonplaceholder.typicode.com/posts
^
2 | 
3 | ###