MNT: remove un-used public dictionary

tacaswell · tacaswell · commit 3d3130a294cb · 2017-01-16T18:01:27.000-05:00
This dictionary was added in #5775 sha: 9655f45 (and not yet released) and was removed from internal use by #6382 sha: (master) 22a7b95 / (2.x backport) 3281bcd
diff --git a/lib/matplotlib/colors.py b/lib/matplotlib/colors.py
@@ -260,7 +260,6 @@ def to_hex(c, keep_alpha=False):
 ### Backwards-compatible color-conversion API
 
 cnames = CSS4_COLORS
-COLOR_NAMES = {'xkcd': XKCD_COLORS, 'css4': CSS4_COLORS, 'tab': TABLEAU_COLORS}
 hexColorPattern = re.compile("\A#[a-fA-F0-9]{6}\Z")
 
 
