I grew some chinese eggplant plants this year(14 plants).
I started them late, but they have begun producing nicely.

My question is:
"What's up with one of the plants which is twice as big as the others and is not producing eggplants?"

The huge anomalous plant has gotten flowers, but instead of producing eggplants where the flowers were, it has grown round balls with sharp spikes on them(1.5"-2"). Here's a picture:


I assume they are seed pods, but will they be worth saving, or would they just grow more plants that do not produce eggplants?
I'd kind of like to yank that plant since it is casting shadow on the smaller plants that are producing.

All what's growing came from the same seed packet:
Botanical Interests brand
"Eggplant Ai Qua, Ai Gua
Long Purple - Japanese/Chinese
Solanum melongena"