debugger: remove unused function argument

The `{colors: true}` removed here is ignored by the function it is being
sent to.

PR-URL: https://github.com/nodejs/node/pull/38400


Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>