nsComputedDOMStyle::RemoveProperty(const nsAReadableString& aPropertyName, nsAWritableString& aReturn)
nsComputedDOMStyle::RemoveProperty(const nsAString& aPropertyName, nsAString& aReturn)
nsComputedDOMStyle::RemoveProperty(const nsAReadableString& aPropertyName,                                   nsAWritableString& aReturn){  return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;}