don't sweat it
nabocklish
nonconcerned
fuggedaboudit
never you mind
careless
uninterfered
uninterfered with
nonproblematic
unrisked
undistressing
unoutraged
no worries
unangry
nontroubled
nonangry
noninterfering
let well alone
unangered
unprescinded
nonupset
unupset
unaggravated
unembattled
unwreathed
unobstructing
nonpressuring
unafflicting
unworrying
unworrisome
unprecautioned
unwithdrawing
not at all
noncarious
unanguished
unexempted
uncounteracted
unannoyed
nonnecessary
nonexempted
nonperturbed
need not
unfurious
unsullen
unsubjected
unsuppressive
uncontrolling
don't knock it till you've tried it
through with
unlitigated