MADRID (Reuters) -Spain’s national prosecutor’s office has dropped two investigations into alleged fraud in former King Juan Carlos’s business dealings after failing to find sufficient evidence of criminal activity, it said on Wednesday. Juan Carlos, 84, who left Spain for the United Arab Emirates under a cloud of scandal in August 2020, has been the subject of multiple money-laundering investigations by Spanish and Swiss authorities for the past two years. Spain’s decision to close the two probes, linked to payments allegedly received over a high-speed train contract in Saudi Arabia and an of…