WASHINGTON — The IRS on Monday removed the “entire investigative team” from its long-running tax fraud probe of first son Hunter Biden in alleged retaliation against the whistleblower who alleged a coverup, The Post has learned. The purge allegedly was done on the orders of the Justice Department, the whistleblower’s attorneys told Congress in “Today the Internal Revenue Service (IRS) Criminal Supervisory Special Agent we represent was informed that he and his entire investigative team are being removed from the ongoing and sensitive investigation of the high-profile, controversial subject about which our client sought to make whistleblower disclosures to Congress....