dispensable
dɪˈspɛnsəb(ə)l
adjective
able to be replaced or done without; superfluous.
the captain’s loss of form made him dispensable
expendable,disposable,replaceable,inessential,unessential,non-essential,skippable,unnecessary,unneeded,needless,not required,redundant,superfluous,surplus to requirements,gratuitous,uncalled for