The case charging Hunter Biden with engaging in a multimillion-dollar bribery scheme suffered a massive blow after the informant central to the case and to the Republican impeachment inquiry in Congress — was slapped with allegations of lying to the FBI. “I think it eviscerates the impeachment effort,” former Deputy Assistant Attorney General Elliot Williams said during an appearance on CNN. “And any evidence linking current President Biden to wrongdoing was pretty thin to begin with.” Alexander Smirnov stands accused of telling tall tales back in June 2020 involving Ukrainian energy company B…