route/tc: Remove unused function tca_set_kind()

The public prototype and the last internal user of the function were
removed in commit 8eb5b55 ("Unified TC API") and it was unexported in
commit 4280dfb ("build: don't export internal symbols"), so it is
safe to remove it.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Thomas Haller <thaller@redhat.com>

thom311/libnl#122

lib/route/tc.c

@@ -239,12 +239,6 @@ int rtnl_tc_msg_build(struct rtnl_tc *tc, int type, int flags,
 	return err;
 }
 
-void tca_set_kind(struct rtnl_tc *t, const char *kind)
-{
-	strncpy(t->tc_kind, kind, sizeof(t->tc_kind) - 1);
-	t->ce_mask |= TCA_ATTR_KIND;
-}
-
 
 /** @endcond */