Remove the has_element function and use FindElement instead.

PiperOrigin-RevId: 557920808
Change-Id: I1eb0ca1ea9e9de542321fbc23d82218c5d449fbf

absl/container/internal/raw_hash_set.h

@@ -2453,8 +2453,10 @@ class raw_hash_set {
     const raw_hash_set* outer = &a;
     const raw_hash_set* inner = &b;
     if (outer->capacity() > inner->capacity()) std::swap(outer, inner);
-    for (const value_type& elem : *outer)
-      if (!inner->has_element(elem)) return false;
+    for (const value_type& elem : *outer) {
+      auto it = PolicyTraits::apply(FindElement{*inner}, elem);
+      if (it == inner->end() || !(*it == elem)) return false;
+    }
     return true;
   }
 
@@ -2659,24 +2661,6 @@ class raw_hash_set {
     }
   }
 
-  bool has_element(const value_type& elem) const {
-    size_t hash = PolicyTraits::apply(HashElement{hash_ref()}, elem);
-    auto seq = probe(common(), hash);
-    const ctrl_t* ctrl = control();
-    while (true) {
-      Group g{ctrl + seq.offset()};
-      for (uint32_t i : g.Match(H2(hash))) {
-        if (ABSL_PREDICT_TRUE(
-                PolicyTraits::element(slot_array() + seq.offset(i)) == elem))
-          return true;
-      }
-      if (ABSL_PREDICT_TRUE(g.MaskEmpty())) return false;
-      seq.next();
-      assert(seq.index() <= capacity() && "full table!");
-    }
-    return false;
-  }
-
   // TODO(alkis): Optimize this assuming *this and that don't overlap.
   raw_hash_set& move_assign(raw_hash_set&& that, std::true_type) {
     raw_hash_set tmp(std::move(that));