pull out of :

to stop doing or being involved in something, or to make someone do this.

“They are trying to pull out of the agreement.”

“He threatened to pull his son out of the team.”

“Argentina's government marked the 25th anniversary of the start of the Falklands War with an announcement that it was pulling out of an agreement with Britain regarding oil exploration in the South Atlantic.” (The Economist - Politics This Week: 31st March - 6th April 2007)