Remove old documentation that was mistakenly left (#3902)

# Description of Changes

With the refactor docs I had left the original module folder and
mistakenly didn't remove it as requested as per Tyler's comment:
#3877 (review):
> Also please remove the "old files" before merging.

# API and ABI breaking changes

N/A

# Expected complexity level and risk

1

# Testing

Removal of documents there is no test to run

Co-authored-by: Zeke Foppa <196249+bfops@users.noreply.github.com>

Author: JasonAtClockwork