Update removeMember docs after #693

Author: orivej

Diff for: include/json/value.h

@@ -538,14 +538,11 @@ Json::Value obj_value(Json::objectValue); // {}
   /// \brief Remove and return the named member.
   ///
   /// Do nothing if it did not exist.
-  /// \return the removed Value, or null.
   /// \pre type() is objectValue or nullValue
   /// \post type() is unchanged
-  /// \deprecated
   void removeMember(const char* key);
   /// Same as removeMember(const char*)
   /// \param key may contain embedded nulls.
-  /// \deprecated
   void removeMember(const JSONCPP_STRING& key);
   /// Same as removeMember(const char* begin, const char* end, Value* removed),
   /// but 'key' is null-terminated.