Before: $ docker update --cpu-period Status: flag needs an argument: --cpu-period See 'docker update --help'., Code: 125 After: $ docker update --cpu-period flag needs an argument: --cpu-period See 'docker update --help'. Also remove flagErrorFunc function which isn't needed anymore. Signed-off-by: Antonio Murdaca <runcom@redhat.com> Upstream-commit: c2c2617534685917c4a1c2367af861c598cc050a Component: engine