Update swisstable swap API comments to no longer guarantee that we don't…

Update swisstable swap API comments to no longer guarantee that we don't move/swap individual elements.

These comments have been wrong since the launch of swisstable SOO.

PiperOrigin-RevId: 655916107
Change-Id: I18af13ccb19702266551b43251370a95f6c8bc90

absl/container/flat_hash_map.h

@@ -426,8 +426,7 @@ class ABSL_INTERNAL_ATTRIBUTE_OWNER flat_hash_map
   // flat_hash_map::swap(flat_hash_map& other)
   //
   // Exchanges the contents of this `flat_hash_map` with those of the `other`
-  // flat hash map, avoiding invocation of any move, copy, or swap operations on
-  // individual elements.
+  // flat hash map.
   //
   // All iterators and references on the `flat_hash_map` remain valid, excepting
   // for the past-the-end iterator, which is invalidated.

absl/container/flat_hash_set.h

@@ -360,8 +360,7 @@ class ABSL_INTERNAL_ATTRIBUTE_OWNER flat_hash_set
   // flat_hash_set::swap(flat_hash_set& other)
   //
   // Exchanges the contents of this `flat_hash_set` with those of the `other`
-  // flat hash set, avoiding invocation of any move, copy, or swap operations on
-  // individual elements.
+  // flat hash set.
   //
   // All iterators and references on the `flat_hash_set` remain valid, excepting
   // for the past-the-end iterator, which is invalidated.

absl/container/node_hash_map.h

@@ -417,8 +417,7 @@ class ABSL_INTERNAL_ATTRIBUTE_OWNER node_hash_map
   // node_hash_map::swap(node_hash_map& other)
   //
   // Exchanges the contents of this `node_hash_map` with those of the `other`
-  // node hash map, avoiding invocation of any move, copy, or swap operations on
-  // individual elements.
+  // node hash map.
   //
   // All iterators and references on the `node_hash_map` remain valid, excepting
   // for the past-the-end iterator, which is invalidated.

absl/container/node_hash_set.h

@@ -349,8 +349,7 @@ class ABSL_INTERNAL_ATTRIBUTE_OWNER node_hash_set
   // node_hash_set::swap(node_hash_set& other)
   //
   // Exchanges the contents of this `node_hash_set` with those of the `other`
-  // node hash set, avoiding invocation of any move, copy, or swap operations on
-  // individual elements.
+  // node hash set.
   //
   // All iterators and references on the `node_hash_set` remain valid, excepting
   // for the past-the-end iterator, which is invalidated.