Clean up code, remove _now command function

Marlin/Marlin.h

@@ -244,7 +244,6 @@ inline bool IsRunning() { return  Running; }
 inline bool IsStopped() { return !Running; }
 
 bool enqueue_and_echo_command(const char* cmd, bool say_ok=false); //put a single ASCII command at the end of the current buffer or return false when it is full
-void enqueue_and_echo_command_now(const char* cmd); // enqueue now, only return when the command has been enqueued
 void enqueue_and_echo_commands_P(const char* cmd); //put one or many ASCII commands at the end of the current buffer, read from flash
 void clear_command_queue();
 

Marlin/Marlin_main.cpp

@@ -896,10 +896,6 @@ bool enqueue_and_echo_command(const char* cmd, bool say_ok/*=false*/) {
   return false;
 }
 
-void enqueue_and_echo_command_now(const char* cmd) {
-  while (!enqueue_and_echo_command(cmd)) idle();
-}
-
 void setup_killpin() {
   #if HAS_KILL
     SET_INPUT_PULLUP(KILL_PIN);

Marlin/UBL_G29.cpp

@@ -1363,6 +1363,7 @@
 
       do_blocking_move_to_z(Z_CLEARANCE_DEPLOY_PROBE);    // Move the nozzle to where we are going to edit
       do_blocking_move_to_xy(LOGICAL_X_POSITION(rawx), LOGICAL_Y_POSITION(rawy));
+
       float new_z = ubl.z_values[location.x_index][location.y_index];
       
       round_off = (int32_t)(new_z * 1000.0);    // we chop off the last digits just to be clean. We are rounding to the