Removing tomato leaves does not work to increase harvests with caged or ground grown tomatoes. In other words – a general rule is do not remove leaves of tomato plants in the garden.
This is one of those bits of “Internet advice” we love to hate.
Having said that – with staked tomatoes only.
An old trick I learned when growing greenhouse tomatoes was to remove the lower tomato leaves (below the truss of tomatoes ripening) as the plant grew up the string or stake.
This didn’t reduce the harvest but it did reduce the amount of water splash or disease that got established on the plant. Made it all neat and clean with more air circulation between plants to hold down disease.
So – as the fruit ripens (it ripens from the bottom to the top) you can remove the leaves from below the current ripening fruit cluster if you really feel like doing it.
Do not remove leaves from above the lowest ripening fruit cluster. In other words, remove leaves from all points below existing tomatoes.
And as you harvest the last tomato from a fruit set, remove the leaves below it.