Slightly refactor pruneInactive
Slightly refactor pruneInactive

Mostly inconsequential, but this new code better reflects the code
style I'd like to have in PS.

DesoGit/Tsunami_PS,Enigami/Pokemon-Showdown,jd4564/Pokemon-Showdown,Enigami/Pokemon-Showdown,xCrystal/Pokemon-Showdown,Alpha-Devs/OmegaRuby-Server,Mystifi/Exiled,zek7rom/SpacialGaze,Lord-Haji/SpacialGaze,svivian/Pokemon-Showdown,QuiteQuiet/Pokemon-Showdown,cadaeic/Pokemon-Showdown,SolarisFox/Pokemon-Showdown,Kokonoe-san/Glacia-PS,aakashrajput/Pokemon-Showdown,Mystifi/Exiled,ShowdownHelper/Saffron,Pikachuun/Pokemon-Showdown,AustinXII/Pokemon-Showdown,Elveman/RPCShowdownServer,azum4roll/Pokemon-Showdown,QuiteQuiet/Pokemon-Showdown,Bryan-0/Pokemon-Showdown,ShowdownHelper/Saffron,Git-Worm/City-PS,DesoGit/Tsunami_PS,DarkSuicune/Pokemon-Showdown,Alpha-Devs/Alpha-Server,Elveman/RPCShowdownServer,Guernouille/Pokemon-Showdown,HoeenCoder/SpacialGaze,PS-Spectral/Spectral,Git-Worm/City-PS,DesoGit/TsunamiPS,xfix/Pokemon-Showdown,svivian/Pokemon-Showdown,EienSeiryuu/Pokemon-Showdown,sirDonovan/Pokemon-Showdown,AnaRitaTorres/Pokemon-Showdown,Zarel/Pokemon-Showdown,jd4564/Pokemon-Showdown,ZestOfLife/PSserver,DesoGit/TsunamiPS,AWailOfATail/Pokemon-Showdown,HoeenCoder/SpacialGaze,KewlStatics/Alliance,aakashrajput/Pokemon-Showdown,ZestOfLife/PSserver,KewlStatics/Alliance,urkerab/Pokemon-Showdown,panpawn/Gold-Server,AustinXII/Pokemon-Showdown,Volcos/SpacialGaze,xCrystal/Pokemon-Showdown,CreaturePhil/Showdown-Boilerplate,panpawn/Gold-Server,xCrystal/Pokemon-Showdown,Mystifi/Exiled,Lord-Haji/SpacialGaze,svivian/Pokemon-Showdown,Guernouille/Pokemon-Showdown,cadaeic/Pokemon-Showdown,AnaRitaTorres/Pokemon-Showdown,svivian/Pokemon-Showdown,QuiteQuiet/Pokemon-Showdown,ZestOfLife/FestiveLife,TbirdClanWish/Pokemon-Showdown,xfix/Pokemon-Showdown,AWailOfATail/Pokemon-Showdown,panpawn/Pokemon-Showdown,ZestOfLife/FestiveLife,xfix/Pokemon-Showdown,jumbowhales/Pokemon-Showdown,HoeenCoder/SpacialGaze,Bryan-0/Pokemon-Showdown,Sora-League/Sora,aakashrajput/Pokemon-Showdown,svivian/Pokemon-Showdown,Kokonoe-san/Glacia-PS,panpawn/Gold-Server,KewlStatics/Shit,Sora-League/Sora,urkerab/Pokemon-Showdown,Flareninja/Showdown-Boilerplate,danpantry/Pokemon-Showdown,PS-Spectral/Spectral,Sora-League/Sora,sirDonovan/Pokemon-Showdown,HoeenCoder/SpacialGaze,TbirdClanWish/Pokemon-Showdown,danpantry/Pokemon-Showdown,xfix/Pokemon-Showdown,KewlStatics/Shit,Lord-Haji/SpacialGaze,SolarisFox/Pokemon-Showdown,DarkSuicune/Pokemon-Showdown,Zarel/Pokemon-Showdown,xfix/Pokemon-Showdown,sirDonovan/Pokemon-Showdown,Volcos/SpacialGaze,CreaturePhil/Showdown-Boilerplate,Alpha-Devs/Alpha-Server,PS-Spectral/Spectral,DesoGit/Tsunami_PS,zek7rom/SpacialGaze,Flareninja/Showdown-Boilerplate,EienSeiryuu/Pokemon-Showdown,Zarel/Pokemon-Showdown,CharizardtheFireMage/Showdown-Boilerplate,jumbowhales/Pokemon-Showdown,urkerab/Pokemon-Showdown,Alpha-Devs/OmegaRuby-Server,CreaturePhil/Showdown-Boilerplate,AustinXII/Pokemon-Showdown,azum4roll/Pokemon-Showdown,ShowdownHelper/Saffron,AWailOfATail/Pokemon-Showdown,Enigami/Pokemon-Showdown,CharizardtheFireMage/Showdown-Boilerplate,Pikachuun/Pokemon-Showdown,jumbowhales/Pokemon-Showdown,Enigami/Pokemon-Showdown,panpawn/Pokemon-Showdown