No, not necessarily. The stall warning system can flicker on some types of aircraft during the take-off roll as a result of wind gusts momentarily operating the lift detector, or de-ice fluid residue being displaced onto the lift detector at the start of the take-off run. I have experienced both of these causal factors in my career.
If the stall warning system began to continuously operate during the take-off roll, then yes, that would provide reasonable justification to reject the take-off. But, for a flicker (implies momentary operation that then stops)? I don't think there are too many pilots who would elect to reject for a flicker.