June 19 (Reuters) - Talks that had been planned for Friday between the United States and Iran at the Burgenstock mountaintop resort in Switzerland will not take place, according to a Swiss foreign ministry statement. The announcement came after a White House spokesperson said overnight that U.S. Vice President JD Vance had pulled out of a planned trip to meet Iranian negotiators in Switzerland on Friday to begin talks on implementing an agreement struck between Tehran and Washington to end the war.