Wiktionary
vb. 1 (en-simple pastcould do without) 2 (en-simple pastcan do without)
Usage examples of "could have done without".
I helped make sure the great chariot race actually happened, though that involved helping the Orcs' entrant as well, which I could have done without.
He could have done without the heavy mist which rose with the dying wind, but at least it clung close to the water, and the lighthouses on Rathlin Island burned bright above the fog.
That was one side of a living, breathing democracy which Tourville was honest enough to admit he could have done without.
Nynaeve could have done without his cool blue eyes, without even a silent audience.
Other times it just seemed stifling, but right now she could have done without the technological marvels of modern times.
On the other hand, he could have done without her being so intrigued.
Niall could have done without Valda, but then the great majority of the Children’.
Making a slicing noise, No-Helmet pulled a finger across his throat, with a smile I could have done without.
Gerin answered, putting an arm around his son, who looked as if he could have done without the attention.
The mage from the City of Elabon looked as if he could have done without that sunny smile.