[RFA 0/3] Remove some Ada cleanups

[Tom Tromey]

A while back I sent a longer series to remove Ada cleanups:

https://sourceware.org/ml/gdb-patches/2017-11/msg00812.html

I didn't address all the reviews, and that's bit-rotted a bit.

This short series is just a few simple fixes from that older one.  It
doesn't remove all the cleanups from the Ada code; I figured it's a
bit better to do this in smaller pieces.

Tested by the buildbot.

Tom