Undo the external contributions we have accepted to the well-known types

For legal reasons we unfortunately cannot accept any external contributions to
the well-known type protos, so this change reverts the small number of changes
we have received so far.

PiperOrigin-RevId: 517211904
diff --git a/objectivec/GPBAny.pbobjc.h b/objectivec/GPBAny.pbobjc.h
index d5378f4..f4efbb2 100644
--- a/objectivec/GPBAny.pbobjc.h
+++ b/objectivec/GPBAny.pbobjc.h
@@ -74,7 +74,7 @@
  *       foo = any.unpack(Foo.getDefaultInstance());
  *     }
  *
- * Example 3: Pack and unpack a message in Python.
+ *  Example 3: Pack and unpack a message in Python.
  *
  *     foo = Foo(...)
  *     any = Any()
@@ -84,7 +84,7 @@
  *       any.Unpack(foo)
  *       ...
  *
- * Example 4: Pack and unpack a message in Go
+ *  Example 4: Pack and unpack a message in Go
  *
  *      foo := &pb.Foo{...}
  *      any, err := anypb.New(foo)
@@ -104,7 +104,7 @@
  * name "y.z".
  *
  * JSON
- *
+ * ====
  * The JSON representation of an `Any` value uses the regular
  * representation of the deserialized, embedded message, with an
  * additional field `\@type` which contains the type URL. Example: