MINOR: cache: Remove redundant test in http_action_req_cache_use

The suppressed check is fully covered by the next one and can then be
removed.
diff --git a/src/cache.c b/src/cache.c
index 101ef35..1f1428d 100644
--- a/src/cache.c
+++ b/src/cache.c
@@ -1767,9 +1767,6 @@
 	if (!sha1_hosturi(s))
 		return ACT_RET_CONT;
 
-	if ((s->txn->flags & (TX_CACHE_IGNORE|TX_CACHEABLE)) == TX_CACHE_IGNORE)
-		return ACT_RET_CONT;
-
 	if (s->txn->flags & TX_CACHE_IGNORE)
 		return ACT_RET_CONT;