Which act repealed the Stamp Act of 1765?

The Stamp Act was repealed through a resolution approximately one year after it was enacted. No specific act was passed to replace or repeal the Stamp Act. It was repealed by Parliament as an expedient meant to stop the unrest in the colonies and improve the economy in the colonies in order to increase trade.
After the Stamp Act was repealed, Parliament did move to pass the Declaratory Act, which reaffirmed Parliament's ability to tax the colonies for the purpose of raising revenue without colonial representation. This act was not limited to the American colonies, as the Declaratory Act reaffirmed that Parliament had the same powers and authorities over all English colonial holdings. Following the Declaratory Act, a number of new taxes were also established. These met with the same criticisms that the Stamp Act had.