Photo: ironSourceThe moves leave little of the Israeli ad-tech firm within Unity, marking a quiet unwind of one of the sector’s most high-profile mergers. The decision by Unity Technologies to shut down the ironSource advertising network marks a quiet but decisive end to one of Israel’s most prominent ad-tech stories, less than four years after a merger that was meant to reshape the mobile advertising landscape.In an investor update released Thursday, Unity confirmed that the ironSource Ad Netwo...