Method remove

API/fleece/Mutable.hh:184–184

        bool isChanged() const                  {return FLMutableDict_IsChanged(*this);}

        void remove(slice key)                  {FLMutableDict_Remove(*this, key);}

        Slot set(slice key)                     {return FLMutableDict_Set(*this, key);}
        void setNull(slice key)                 {set(key) = nullValue;}