Given the new information about the Fusion GPS Dossier, should Robert Mueller step aside as special prosecutor?

New information has been released that shows that Fusion GPS was being paid by groups working for Hillary Clinton, Barack Obama, and the DNC when they created and released the dossier that claimed a Trump/Russia collusion. The FBI James Comey may also be involved based on this evidence. Given this new evidence, should Robert Mueller step aside as special prosecutor due to his close ties to Comey and Clinton? Please note: This is not to suggest Mueller is corrupt, but rather should he step aside to avoid questions of his integrity later on?