Answer:
To avoid self-pollination
Step-by-step explanation:
Most types of flowers are monoecious in nature meaning they contain both the staminate and pistillate flowers. Mendel wanted to prove that that there are laws that govern inheritance and that characteristics of an organism are determined by hereditary factors which occur in pair.
He remove the male parts of the flower to avoid self pollination of the short flowers since he intended to obtain pure breeds of the plant.