Fix compiler warning sketch/Marlin_main.cpp:4307:7: warning: unused variable 'Z_PROBE_FEEDRATE' [-Wunused-variable].

This variable was unused even in "Initial commit".

Firmware/Marlin_main.cpp

@@ -4304,7 +4304,6 @@ void process_commands()
 		int iy = 0;
 
 		int XY_AXIS_FEEDRATE = homing_feedrate[X_AXIS] / 20;
-		int Z_PROBE_FEEDRATE = homing_feedrate[Z_AXIS] / 60;
 		int Z_LIFT_FEEDRATE = homing_feedrate[Z_AXIS] / 40;
 		bool has_z = is_bed_z_jitter_data_valid(); //checks if we have data from Z calibration (offsets of the Z heiths of the 8 calibration points from the first point)
 		#ifdef SUPPORT_VERBOSITY
@@ -8030,7 +8029,6 @@ void bed_analysis(float x_dimension, float y_dimension, int x_points_num, int y_
 	plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS], homing_feedrate[Z_AXIS] / 60, active_extruder);
 
 	int XY_AXIS_FEEDRATE = homing_feedrate[X_AXIS] / 20;
-	int Z_PROBE_FEEDRATE = homing_feedrate[Z_AXIS] / 60;
 	int Z_LIFT_FEEDRATE = homing_feedrate[Z_AXIS] / 40;
 
 	setup_for_endstop_move(false);