In b-tree, support unassignable value types.

Avoid using value move/swap and delete those functions from slot_policy types. There was only one use of params_type::move in `erase`.

PiperOrigin-RevId: 453237739
Change-Id: Ie81c6dba6c4db34e97a067d2c0defcded8044a5a

1 files changed, 0 insertions, 11 deletions

diff --git a/absl/container/btree_set.h b/absl/container/btree_set.h
index 32a7c506..695b09f5 100644
--- a/absl/container/btree_set.h
+++ b/absl/container/btree_set.h
@@ -766,17 +766,6 @@ struct set_slot_policy {
     construct(alloc, new_slot, old_slot);
     destroy(alloc, old_slot);
   }
-
-  template <typename Alloc>
-  static void swap(Alloc * /*alloc*/, slot_type *a, slot_type *b) {
-    using std::swap;
-    swap(*a, *b);
-  }
-
-  template <typename Alloc>
-  static void move(Alloc * /*alloc*/, slot_type *src, slot_type *dest) {
-    *dest = std::move(*src);
-  }
 };
 
 // A parameters structure for holding the type parameters for a btree_set.