The lint make target is not used anywhere in the codebase and is particular not run in the CI.
It was recently discovered that `make lint` does not even work at all.
It was subsequently suggested to remove the broken and unused target altogether.
This change settles that issue by removing the lint target and the preparatory
golint installation target.
Fixes: #15317
Signed-off-by: Michael Adam <obnox@samba.org>
Michael Adam
5c39ac537a