That's a complex question. It really depends on your goals and your definition of bigger, stronger, and cardio. All of those terms mean different things to different people. It also depends on your starting point. If you are thin and literally just starting to lift, that's different than someone medium sized who is been lifting aimlessly for a while, etc.
So, a little more specifics about yourself and your goals would be helpful in determining a more precise answer to your question.
In general, if you just want to get "bigger and stronger", than no, you don't "need" any cardio. However some conditioning will help you get stronger more efficiently, so some types of "cardio" would be beneficial.
I am Anton Zdravko Martin!
Best meet lifts: Sq 150 Kg (330 lb), Bench 120 Kg (264), DL 160 (352) @89 Kg (197)
Best gym lifts: Sq 375, Bench 280 (pause), DL 385 @205 or less
Goals beyond my wildest dreams, 600 Kg raw total, 200/160/240
Hack away at anything which isn't essential. Do what you love, and do it often. Fazc.
Everything competes for recovery so more assistance is not always the best idea. miked96