Remove binary package verification

This code has been the source of several nagging issues over the last
several releases. It is also unnecessary, since a package installed
using the "sources" argument will still fail if the package's real name
doesn't match the desired name, since the list_pkgs output will show the
true name of the installed package (which will not match what was
specified).

I'm sorry I ever wrote this code, and I'm glad to be rid of it.
Remove references to now-nonexistant function
remove unused imports
Merge pull request #12269 from terminalmage/issue12117

Remove binary package verification