Grand Company Expert Deliveries - Sure you can have my i90 gear.
Now first, luckily I haven't accidently lost any gear this way. But it would not surprise me at all if people are accidently losing i90 gear, or even the class gear for crafting and gathering classes.
So question, you can't delete relic, which is awesome thank god. Not that I could see anyone accidently deleting that. Here's the thing though.
I did accidently delete my hero's belt of fending a while ago. I was clearing out my armory chest before 2.1 when the Expert Delivery got patched. (It wouldn't show everything)
Why would you wanna get rid of your i90 gear you buy with myth anyway? Or your class gear. Really why give the option to even make that mistake so easily. Should have like a 20/20 are you sure thing.