Add API function for removing legend label from graph

[alexanderwhatley]

Right now, there does not appear to be an API function for removing a legend label from a matplotlib graph. This could be useful for say an interactive graph.

[fariza]

You can do it by

for leg in list(fig.legends):
                leg.set_visible(state)

Where state is True/False

[fariza]

I am closing this issue, if the answer is not what you were looking for, please reopen the issue