Docs: document the use_axis_view argumeht to view_roll_angle

Also remove event print left in by accident.

source/blender/editors/space_view3d/view3d_navigate_roll.c

@@ -24,6 +24,11 @@
 /** \name View Roll Operator
  * \{ */
 
+/**
+ * \param use_axis_view: When true, keep axis-aligned orthographic views
+ * (when rotating in 90 degree increments). While this may seem obscure some NDOF
+ * devices have key shortcuts to do this (see #NDOF_BUTTON_ROLL_CW & #NDOF_BUTTON_ROLL_CCW).
+ */
 static void view_roll_angle(ARegion *region,
                             float quat[4],
                             const float orig_quat[4],

source/blender/windowmanager/intern/wm_event_system.c

@@ -3185,8 +3185,6 @@ static int wm_handlers_do(bContext *C, wmEvent *event, ListBase *handlers)
 
         CLOG_INFO(WM_LOG_HANDLERS, 1, "handling PRESS_DRAG");
 
-        WM_event_print(event);
-
         action |= wm_handlers_do_intern(C, win, event, handlers);
 
         event->direction = 0;