Revert "[ENH] Add fig.mne container for colorbar (mne-tools#13019)"

This reverts commit 4f1f4bb.

Author: larsoner

doc/changes/devel/13019.newfeature.rst

@@ -6,7 +6,6 @@
 
 from functools import partial
 from itertools import cycle
-from types import SimpleNamespace
 
 import numpy as np
 
@@ -372,7 +371,6 @@ def _plot_connectivity_circle(
         cb_yticks = plt.getp(cb.ax.axes, "yticklabels")
         cb.ax.tick_params(labelsize=fontsize_colorbar)
         plt.setp(cb_yticks, color=textcolor)
-        fig.mne = SimpleNamespace(colorbar=cb)
 
     # Add callback for interaction
     if interactive:

mne/viz/circle.py

@@ -17,10 +17,7 @@ def test_plot_channel_labels_circle():
     fig, axes = plot_channel_labels_circle(
         dict(brain=["big", "great", "smart"]),
         colors=dict(big="r", great="y", smart="b"),
-        colorbar=True,
     )
-    # check that colorbar handle is returned
-    assert isinstance(fig.mne.colorbar, matplotlib.colorbar.Colorbar)
     texts = [
         child.get_text()
         for child in axes.get_children()