„Leave miner“ removal of leaves?

As someone who has grown outdoors for forty years, I never worry about the odd bit of damage. Usually, if left alone for nature to solve it, a predator of whatever insect is causing the damage will arrive soon enough and get rid of the problem. Spraying anything also gets rid of good bugs, not just the problem ones and when there is an imbalance, this is when infestations and real problems occur. Often, doing nothing is the best option. I would not remove any leaves, leaf miner damage is, well.............minor! It may look ugly to you, but the plant will hardly notice and growth should not be affected in any way. If you really must spray something, a product with BT would solve your leaf miner issue. But only ever spray when the plant is in veg growth, spraying buds with anything is a no-no in my book.