efl_ui/pan: only emit size change event on pan content size change

Summary:
changing the size of the pan content does not require that the pan
position also changes, so let users of pan sort this out using the correct
events

ref T7708
Depends on D9790

Reviewers: segfaultxavi

Reviewed By: segfaultxavi

Subscribers: cedric, #reviewers, #committers

Tags: #efl_widgets

Maniphest Tasks: T7708

Differential Revision: https://phab.enlightenment.org/D9791

src/lib/elementary/efl_ui_pan.c

@@ -141,7 +141,6 @@ _efl_ui_pan_content_resize_cb(void *data,
         psd->content_h = sz.h;
         evas_object_smart_changed(pobj);
      }
-   efl_event_callback_call(pobj, EFL_UI_PAN_EVENT_PAN_CONTENT_POSITION_CHANGED, NULL);
    efl_event_callback_call(pobj, EFL_UI_PAN_EVENT_PAN_CONTENT_SIZE_CHANGED, &sz);
 }