Need to remove a disk from zfs pool

UNIX Solaris
1

I accidently added a disk in different zpool instead of pool, where I want.

root@prtdrd21:/# zpool status cvfdb2_app_pool
  pool: cvfdb2_app_pool
 state: ONLINE
 scan: none requested
config:
        NAME           STATE     READ WRITE CKSUM
        cvfdb2_app_pool  ONLINE       0     0     0
          emcpower62c  ONLINE       0     0     0
          emcpower63c  ONLINE       0     0     0
          emcpower64c  ONLINE       0     0     0
          emcpower65c  ONLINE       0     0     0
          emcpower77c  ONLINE       0     0     0
          emcpower78a  ONLINE       0     0     0

I need to remove last disk, emcpower78a. It is coming from SAN. Somebody please suggest.

2 
zpool remove pool device