unset Quota by Throttle Type

//first set_quota to  USER=> 'u1'
set_quota TYPE => THROTTLE, USER => 'u1', THROTTLE_TYPE => WRITE, LIMIT => '1000req/sec'

//then 
hbase(main):004:0> set_quota TYPE => THROTTLE, THROTTLE_TYPE => WRITE, USER => 'u1', LIMIT => NONE

ERROR: Unexpected arguments: {"THROTTLE_TYPE"=>"WRITE"}

// or try "THROTTLE_TYPE"=>"WRITE_NUMBER"
hbase(main):012:0* set_quota TYPE => THROTTLE, THROTTLE_TYPE => WRITE_NUMBER, USER => 'u1', LIMIT => NONE

NameError: uninitialized constant WRITE_NUMBER