Whats the light wattage?
If you're just growing this one plant for your self, just leave it.
Get a scope (40X or use your cell phone and a cheap macro lens for it from ebay). Check the trichs when it's time to harvest and harvest the ones which are ripe, continue as the rest finish.
Depending on the plants flex levels you can also spread the branches out a bit so the light penetrates deeper in to the plant.
Either way though you will be fine. If you chop off the small stuff it won't mess the plant up, maybe give it a couple days to recover and take half off one day and the other half the next. But really either way you will be just fine just depends on what you feel like doing. If it was a couple tables of plants then it would be a different question...