Cleanups to RPC code.

This is extracted from a significantly longer RPC change that I put down a couple of weeks ago.

It deletes some unused code, uses Issue and Book a little more, and fixes some long lines and indentation.

Feel free to use this or ignore it!
Not so, it clutters up our code.  Each marginal one costs a tiny amount.

I also removed the names of the variables - which add nothing either.