Made line number reporting optional via config.h

planner.c

@@ -280,8 +280,9 @@ void plan_buffer_line(float *target, float feed_rate, uint8_t invert_feed_rate,
   block->millimeters = 0;
   block->direction_bits = 0;
   block->acceleration = SOME_LARGE_VALUE; // Scaled down to maximum acceleration later
+#ifdef USE_LINE_NUMBERS
   block->line_number = line_number;
-
+#endif
   // Compute and store initial move distance data.
   // TODO: After this for-loop, we don't touch the stepper algorithm data. Might be a good idea
   // to try to keep these types of things completely separate from the planner for portability.