Purge Highcharts from Orange distribution

LICENSE

@@ -6,9 +6,6 @@ All rights reserved.
THIS SOFTWARE IS PROVIDED "AS IS", WITHOUT ANY WARRANTY WHATSOEVER.

If you use or redistribute this software, you are permitted to do so
under the terms of [GNU GPL v3+] license.
under the terms of GNU [GPL-3.0]+ license.

In addition, some parts of the program are distributed under different
license terms. Please see ATTRIBUTION file for details.

[GNU GPL v3+]: https://www.gnu.org/licenses/gpl-3.0.en.html
[GPL-3.0]: https://www.gnu.org/licenses/gpl-3.0.en.html

Orange/canvas/report/report.py

@@ -154,23 +154,27 @@ def report_plot(self, name=None, plot=None):
        """
        if not (isinstance(name, str) and plot is None):
            name, plot = self._fix_args(name, plot)

        from pyqtgraph import PlotWidget, PlotItem, GraphicsWidget, GraphicsView
        from Orange.widgets.highcharts import Highchart
        from Orange.widgets.utils.webview import WebviewWidget

        self.report_name(name)
        if plot is None:
            plot = getdeepattr(self, self.graph_name)
        if isinstance(plot, QGraphicsScene):
            self.report_html += get_html_img(plot)
        elif isinstance(plot, PlotItem):
        if isinstance(plot, (QGraphicsScene, PlotItem)):
            self.report_html += get_html_img(plot)
        elif isinstance(plot, PlotWidget):
            self.report_html += get_html_img(plot.plotItem)
        elif isinstance(plot, GraphicsWidget):
            self.report_html += get_html_img(plot.scene())
        elif isinstance(plot, GraphicsView):
            self.report_html += get_html_img(plot)
        elif isinstance(plot, Highchart):
            self.report_html += plot.svg()
        elif isinstance(plot, WebviewWidget):
            try:
                svg = plot.svg()
            except IndexError:
                svg = plot.html()
            self.report_html += svg

    # noinspection PyBroadException
    def report_table(self, name, table=None, header_rows=0, header_columns=0,