A group of House lawmakers has introduced a bill to repeal Rhode Island’s recently enacted 7 percent tax on pet grooming and other services. Pet groomers have said the tax, which began Oct. 1, would hurt business. Representative K. Joseph Shekarchi, a Democrat from Warwick, has introduced a bill that would repeal the tax. He said the amount of tax the state will collect is negligible and could mean some small businesses can’t stay open. Several lawmakers said when the tax passed that it was needed to balance the budget.