That doesn't refute what I said. In 2016, Shokin did allege he was investigating Hunter. 3 years later, he said he didn't actually investigate him, he was just planning to.
And still, the most salient piece of this came from your link...
...the Burisma case had been dormant at the time the U.S. was pushing for Shokin's removal.
From piecemealing various news reports, Zlochevsky is alleged to have committed crimes between 2010-2012. About 2012, the Prosecutor General's office opened an investigation into Zlochevsky. In 2014, Hunter Biden took a job with Burisma, Zlochevsky's company. Also in 2014, the UK seized some $23 million of Zlochevsky assets as they opened their own investigation. Shokin, who was Deputy Prosecutor General in 2014, was assigned to work with the UK's investigation. About a year later, the UK was forced by a court decision to release the $23 million of Zlochevsky's assets and they dropp the case because they made little, if any, progress. The reason they cited was because Ukraine's Prosecutor General's office was not cooperating with them. Cooperating with them was Shokin's responsibility. Instead, he protected Zlochevsky until the UK had to drop their case. In 2015, Shokin was promoted to Prosecutor General. During that year, no progress was made on the Zlochevsky investigation, which remained dormant. Also during that year, prosecutors under him were caught taking bribes. The U.S., not just Biden, said he and his office was corrupt. So did the international community. So did Ukraine's Rada. So did many Ukraine citizens who protested. Biden, on several occasions, asked Poroshenko, Ukraine's president at the time, to push Shokin out. Poroshenko, long time personal friends with Shokin from even before their revolution, wouldn't do it. He only did it after Biden, with the backing of Obama, threatened to withhold a billion dollars of guaranteed loans. Then Poroshenko finally told Shokin he had to resign. Shokin appealed on the grounds that Biden forced Poroshenko's hand because his son worked for Burisma; and so an investigation into that was opened. Ukraine's Deputy Prosecutor General looked into it and determined there was no active investigation into Burisma so Shokin lost his appeal and resigned.