API/VIS: remove misc plotting methods from plot accessor (revert #23811)
To be clear: I am opening this for discussion, but directly as a PR instead of an issue so it is easier to merge it in case we agree.

https://github.com/pandas-dev/pandas/pull/23811 added the misc plotting methods (like 'andrew_curves', 'parallel_coordinates', .. see http://pandas.pydata.org/pandas-docs/stable/visualization.html#plotting-tools) to the `DataFrame/Series.plot` accessor. 

But personally, I think we really shouldn't expose those methods too much (we should rather be deprecating them, but we only kept them for historical reasons). 

cc @jreback @mroeschke 