`resolve_ident_in_module` is a very thin wrapper around
`resolve_ident_in_module_ext`, and `resolve_ident_in_module_unadjusted`
is a very thin wrapper around `resolve_ident_in_module_unadjusted_ext`.
The wrappers make the call sites slightly more concise, but I don't
think that's worth the extra code and indirection.
This commit removes the two wrappers and removes the `_ext` suffixes
from the inner methods.
Nicholas Nethercote
d71c06d022