TPS: hide axis of legend and spines of channel plots to remove redundant borders in white mode

sohstationviewer/view/plotting/time_power_squared_dialog.py

@@ -224,6 +224,7 @@ class TimePowerSquaredWidget(plotting_widget.PlottingWidget):
         plot_h = self.plotting_axes.get_height(
             total_days, bw_plots_distance=0.003, pixel_height=12.1)
         ax = self.create_axes(self.plotting_bot, plot_h)
+        ax.spines[['right', 'left', 'top', 'bottom']].set_visible(False)
         ax.text(
             -0.1, 1.2,
             f"{get_chan_label(chan_id)} {c_data['samplerate']}",
@@ -282,6 +283,7 @@ class TimePowerSquaredWidget(plotting_widget.PlottingWidget):
             [self.plotting_l, self.plotting_bot, self.plotting_w, plot_h],
             picker=True
         )
+        ax.axis('off')
         ax.patch.set_alpha(0)
         c_labels = self.parent.sel_col_labels
         clrs = self.parent.color_def  # colordef