You don't even have enough leaves to cover the soil so why would you want to remove any?
Leaves are the plants solar panels so as long as the whole leaf isn't shaded it should be left on to make food for the plant.
Even shaded leaves are catching diffuse light and making food for the plant or even if not productive is still resources for the plant as long as it is healthy and green.
Defoliate only when necessary!
You shouldn't be spraying your plants either unless fighting bugs.