tree aa263b78ca11e7605d300df738d6dc26a1a1fd57
parent 7c1171e41da9db6be18e34f40047ff80da782af0
author Sen Jiang <senj@google.com> 1468453419 -0700
committer Sen Jiang <senj@google.com> 1468453709 -0700

Remove extra "error:" in error message.

die() will print "error:", results in double "error:".

For example:
$ brillo_update_payload generate
brillo_update_payload: error: Error: you must specify an output filename with --payload FILENAME

Test: brillo_update_payload generate
Bug: None

Change-Id: I4d2adc492b217be9b02362a9934e8563c61ae113