CLN: Clean up in code and doc

Author: nrebena

pandas/plotting/_matplotlib/core.py

@@ -1359,8 +1359,6 @@ def _make_plot(self):
             ax = self._get_ax(i)
 
             if self.orientation == "vertical":
-                # import pdb
-                # pdb.set_trace()
                 ax.xaxis.update_units(self.ax_index)
                 self.tick_pos = ax.convert_xunits(self.ax_index)
                 self.ax_pos = self.tick_pos - self.tickoffset