Are there transit bolts on this dryer?
Nope. 

The manual makes no mention of having to remove transfer bolts, if the techs want to make a stink about there being bolts and you didn't remove them: no way! Not even if they do exist.

It's probably a penny. I'm unsure, but if the problem is user created this service call might cost you money even if it's under warranty. They might claim you, "put things other than laundry", in it but I'd expect better from Bosch and would hope their warranty extends past manufacturer defects.

I've never come across TBs on a non-combo unit. It shouldn't need them; there's no spring mountings, it's all bearing surfaces.