Fix bright colors
Fix bright colors

Remove old code that set bright colors equal to normal colors. This code
was ancient and led to bright colors being unusable. The code originates
from 0e37d8ef865daddd6af02ba78b4a3bb86fd5917e.

bhilburn/powerlevel9k,dritter/powerlevel9k,bhilburn/powerlevel9k,dritter/powerlevel9k