to avoid
Go this way to avoid traffic jams
To look the other way/to turn one's head away so as not to see somebody
(there's) no need
There's no need to wait/It is not necessary to wait,  I am very busy
'No stamp needed'
'No experience necessary'
It will not be necessary to operate
You needn't be in such a hurry
I want to apologize -  No, don't bother!
It is very late at night,  you needn't bother to come back;  It is very late at night, don't bother to come back!
It saves/spares me the trouble of waiting long