Remove antiquated trace script

This library was originally written to trace local variables. In the
more than two years since it was originally written, the only update it
has received was to remove PEP8/PyLint/quality violations.

It's hard to imagine that this is still useful to anyone, though I'm
open to discussion.
Merge pull request #6066 from stvstnfrd/debt/supertrace

Remove antiquated trace script