SEATTLE — Following President Donald Trump’s scrapping of the Iran nuclear deal Tuesday and his imposition of what he called “powerful” sanctions, Boeing’s prospective sale to Iran of jets worth $9.5 billion is effectively dead for the foreseeable future.For Boeing, it’s a lost opportunity rather than a blow to current plans.Two Iranian deals for 110 aircraft got the go-ahead in the waning days of President Barack Obama’s administration in 2016.But given Trump’s hawkish views on Iran before he took office, Boeing always saw the deals as tenuous.