gdb/solib-svr4: remove svr4_have_link_map_offsets

While C++ifying the solib code, I concluded that all arches that use
SVR4 libraries do provide link map offsets, so I think this function is
unnecessary now.

Change-Id: Ifaae2560d92f658df3724def6219e2f89054e4b7
Approved-By: Tom Tromey <tom@tromey.com>
1 file changed