Don't handle impossible values for align in hist()

The hist() code checks at the beginning that `align` is one of "left",
"mid", or "right", so values of "edge" and "center" are impossible.

Author: anntzer

lib/matplotlib/axes/_axes.py

@@ -6626,7 +6626,7 @@ def hist(self, x, bins=None, range=None, density=None, weights=None,
                 width = dr * totwidth
                 boffset, dw = 0.0, 0.0
 
-            if align == 'mid' or align == 'edge':
+            if align == 'mid':
                 boffset += 0.5 * totwidth
             elif align == 'right':
                 boffset += totwidth
@@ -6695,7 +6695,7 @@ def hist(self, x, bins=None, range=None, density=None, weights=None,
             else:
                 minimum = 0
 
-            if align == 'left' or align == 'center':
+            if align == 'left':
                 x -= 0.5*(bins[1]-bins[0])
             elif align == 'right':
                 x += 0.5*(bins[1]-bins[0])