Clarify some motion code

Marlin/src/module/motion.h

@@ -138,9 +138,7 @@ void line_to_current_position();
  * Move the planner to the position stored in the destination array, which is
  * used by G0/G1/G2/G3/G5 and many other functions to set a destination.
  */
-void line_to_destination(const float fr_mm_s);
-
-inline void line_to_destination() { line_to_destination(feedrate_mm_s); }
+void buffer_line_to_destination(const float fr_mm_s);
 
 #if IS_KINEMATIC
   void prepare_uninterpolated_move_to_destination(const float fr_mm_s=0.0);