Remove old mpl 1.1 compat that used private method
Remove old mpl 1.1 compat that used private method

arokem/seaborn,petebachant/seaborn,phobson/seaborn,anntzer/seaborn,mwaskom/seaborn,anntzer/seaborn,lukauskas/seaborn,mwaskom/seaborn,sauliusl/seaborn,lukauskas/seaborn,arokem/seaborn,phobson/seaborn