revert changes involve in GPS

sohstationviewer/view/plotting/plotting_widget/multi_threaded_plotting_widget.py

@@ -144,6 +144,11 @@ class MultiThreadedPlottingWidget(PlottingWidget):
                     #  instruction here
                     self.processing_log.append((msg, LogType.WARNING))
 
+                # These channels contain GPS data which are only shown in
+                # the GPS dialog.
+                if chan_id in {'GLO', 'VLO', 'VLA', 'GLA', 'VEL', 'VNS', 'GNS',
+                               'GEL'}:
+                    continue
                 plotting_data[chan_id]['chan_db_info'] = chan_db_info
         if not_plot_chans != []:
             msg = (f"The database settings 'plotType' or 'height' show not to "