Remove useless line in offline plot function

[icaromedeiros]

Hello all,

The last line on the snippet shown below (that should be clear in the commit diff) is useless as the figure variable is not used in plot function.

plot_html, plotdivid, width, height = _plot_html(
  figure_or_data, show_link, link_text, validate, '100%', '100%'
)

figure = tools.return_figure_from_figure_or_data(figure_or_data, validate)

Moreover, the same call to tools.return_figure_from_figure_or_data is done within _plot_html.
It seems this is left-out garbage in the code.

A simple pep8/flake8 integration on the tests could solve similar issues.

[ispmarin]

👍

[jackparmer]

+1 Thanks!