Delete stale locations

[RyanTG]

7,665 locations currently on the map.

464 locations haven't been updated in >=4 years
70 haven't been updated in >=5 years
10 haven't been updated in >=6 years
0 that haven't been updated in >=7 years

Feeling like we need a "you're too stale" cutoff, and then delete. I am thinking 5 years.

[RyanTG]

This has been addressed. 7 year cutoff.