Remove "tone_alarm start" command , it will caused to stop to process the following script of it and we don't have it on TMRFC, but we have beeper,and we will change to use beeper to instead of using  it.

NOTE:

After remove "tone_alarm start" and top the process you should see the following ...

NuttShell (NSH)
nsh> top
Processes: 10 total, 2 running, 8 sleeping
CPU usage: 4.15% tasks, 0.28% sched, 95.56% idle
Uptime: 410.064s total, 400.884s idle

 PID COMMAND                   CPU(ms) CPU(%)  USED/STACK PRIO(BASE) STATE
   0 Idle Task                  400884 95.061     0/    0   0 (  0)  READY
   1 hpwork                       1796  0.072   396/ 2040 192 (192)  w:sig
   2 lpwork                       1858  0.072   404/ 2040  50 ( 50)  READY
   3 init                          176  0.000  1140/ 4088 100 (100)  w:sem
  11 mavlink uart rcv               31  0.000   724/ 2992 215 (215)  w:sem
  10 mavlink                       770  0.094   948/ 2040 100 (100)  w:sig
  12 mavlink orb rcv              2712  0.061   884/ 2040 100 (100)  w:sem
  18 top                           237  2.077  1308/ 2992 100 (100)  RUN
  14 commander                    1567  0.077  1748/ 2992 215 (215)  w:sig
  15 commander_low_prio             25  0.000   684/ 2040  50 ( 50)  w:sem

Signed-off-by: cctsao1008 <chiacheng.tsao@gmail.com>