Remove the build with sanity check method

[snoyberg]

Something we discussed offline. The sanity checks will often cause false failures if the primary node is temporarily unavailable. (I just saw this occur for a production service.)

Very much open for discussion on this one, not sure it's the right approach.

[psibi]

I'm not sure about this: I think this is useful if we use wrong grpc url etc. That being said, we can probably give this a try and see how it goes.

[snoyberg]

Cool, let's keep an eye out. Another possibility is adding an explicit sanity_check method, or deferring the chain ID check to the first time we try to do something. Let's see what kinds of failures we run into in practice.