It was a mole hill to begin with

The inspector general, Michael E. Horowitz, has been asking witnesses why FBI leadership seemed unwilling to move forward on the examination of emails found on the laptop of former congressman Anthony Weiner (D-N.Y.) until late October about three weeks after first being alerted to the issue, according to these people, who spoke on the condition of anonymity to discuss the sensitive matter.

Because, in the end, this whole affair is hysterical fantasy, politics as usual.  All the investigations, on both sides, reveal standard operating procedures in both parties, minor corruption in government.  Mueller should just say that, cut the entire crap out and go back to the usual corruption, it is what we expect.