build: massively remove needless checks

Since we have autoconf results from a wide swath of target platforms, we
can go remove checks that have the same result on all systems.

This also removes several "fallback" implementations of functions that,
at some point in the history, weren't available on all target platforms.

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>

1 files changed, 0 insertions, 7 deletions

diff --git a/lib/if.h b/lib/if.h
index 57062cd3fc..7fdd46d3f2 100644
--- a/lib/if.h
+++ b/lib/if.h
@@ -479,13 +479,6 @@ extern struct nbr_connected *nbr_connected_new (void);
 extern void nbr_connected_free (struct nbr_connected *);
 struct nbr_connected *nbr_connected_check (struct interface *, struct prefix *);
 
-#ifndef HAVE_IF_NAMETOINDEX
-extern ifindex_t if_nametoindex (const char *);
-#endif
-#ifndef HAVE_IF_INDEXTONAME
-extern char *if_indextoname (ifindex_t, char *);
-#endif
-
 /* link parameters */
 struct if_link_params *if_link_params_get (struct interface *);
 void if_link_params_free (struct interface *);