public ValueUpdate removeValueUpdate(int index) {
        return valueUpdates.remove(index);
    }
Removes the value update at the specified position in the list of value updates.

@param index the index of the ValueUpdate to remove
@return the ValueUpdate previously at the specified position
@throws IndexOutOfBoundsException if index is out of range
document/src/main/java/com/yahoo/document/update/FieldUpdate.java