Remove numpy 1.6 specific work-arounds #7484
Description
In #7396 / #7483 we bumped the minimum numpy version to 1.7.1. We have a number of workarounds in the code base which should be removed
From master:
09:41 $ ack -i 'numpy.*1\.6' --python
lib/matplotlib/cbook.py
2585:# Numpy > 1.6.x deprecates putmask in favor of the new copyto.
lib/matplotlib/tri/triinterpolate.py
1270: # - it is new in numpy 1.6
lib/matplotlib/category.py
17:# pure hack for numpy 1.6 support
83: """Helper function for numpy 1.6, can be replaced with
lib/matplotlib/tests/test_category.py
160: # Image test would fail on numpy 1.6
lib/matplotlib/colors.py
179: # Python 2.7 / numpy 1.6 apparently require this to return builtin floats,
I would prefer is we not backport these for 2.0 (just being excessively conservative).
attn @story645