Remove references to vanilla gear, systems and bases

This in not an issue at present and probably won't be in Goose, but we are eventually going to run up against StringCache limits if we follow proposed examples for equipment with our approach. Before implementing patches to alleviate this, I would like to claw back the space used by vanilla gear. This will require careful removal of entries from certain files to avoid crashes.

Information on the StringCache and it's limits can be found here:

https://the-starport.com/forums/topic/6129/game-engine-limit-string-cache-overflow?_=1704801427467
https://the-starport.com/forums/topic/6234/visual-limit-on-the-amount-of-numbers-in-the-hold-for-goods-items?_=1704808810314

No files or tests are named. Read the linked StringCache discussions first, then search the repository for vanilla gear, systems, and bases references and identify the affected files. Done means the removable entries are removed without causing crashes and the resulting StringCache usage is reduced.

Written by the indexing model from the issue text.