Remove fake minimum attack distances.
These structures can always attack near enemies because the minimum attack range is within the building obstruction.
Thus prevent the minimum attack distance tooltip from D267 to show misleading numbers, refs D111.
Remove the effective minimum attack distance of the hero cavalry archer too for consistency with all other units following rP13494.

Differential Revision: https://code.wildfiregames.com/D611
Reviewed By: fatherbushido