MEDIUM: resolvers: remove the last occurrences of the "safe" argument

This one was used to indicate whether the callee had to follow particularly
safe code path when removing resolutions. Since the code now uses a kill
list, this is not needed anymore.

(cherry picked from commit 6878f80427aa8befc6662d85caddb8affe799b9c)
Signed-off-by: Willy Tarreau <w@1wt.eu>
4 files changed