Remove extra line per PEP8
Remove extra line per PEP8

paulromano/openmc,walshjon/openmc,amandalund/openmc,mit-crpg/openmc,shikhar413/openmc,paulromano/openmc,bhermanmit/openmc,amandalund/openmc,smharper/openmc,johnnyliu27/openmc,walshjon/openmc,johnnyliu27/openmc,wbinventor/openmc,smharper/openmc,paulromano/openmc,samuelshaner/openmc,wbinventor/openmc,wbinventor/openmc,shikhar413/openmc,shikhar413/openmc,johnnyliu27/openmc,amandalund/openmc,samuelshaner/openmc,liangjg/openmc,liangjg/openmc,walshjon/openmc,liangjg/openmc,paulromano/openmc,shikhar413/openmc,mit-crpg/openmc,amandalund/openmc,johnnyliu27/openmc,smharper/openmc,smharper/openmc,mit-crpg/openmc,mit-crpg/openmc,samuelshaner/openmc,wbinventor/openmc,bhermanmit/openmc,samuelshaner/openmc,liangjg/openmc,walshjon/openmc