MercurialDownloadStrategy: remove redundant chdir
MercurialDownloadStrategy: remove redundant chdir

Signed-off-by: Jack Nagel <43386ce32af96f5c56f2a88e458cb94cebee3751@gmail.com>

vitorgalvao/brew,sjackman/homebrew,MikeMcQuaid/brew,DomT4/brew,EricFromCanada/brew,MikeMcQuaid/brew,jmsundar/brew,mahori/brew,sjackman/homebrew,EricFromCanada/brew,mistydemeo/homebrew,vitorgalvao/brew,Homebrew/brew,konqui/brew,gordonmcshane/homebrew,zmwangx/brew,reitermarkus/brew,JCount/brew,palxex/brew,nandub/brew,Linuxbrew/brew,vitorgalvao/brew,hanxue/linuxbrew,gregory-nisbet/brew,sjackman/homebrew,muellermartin/dist,alyssais/brew,palxex/brew,aw1621107/brew,rwhogg/brew,EricFromCanada/brew,toonetown/homebrew,gordonmcshane/homebrew,DomT4/brew,ilovezfs/brew,zmwangx/brew,mahori/brew,MikeMcQuaid/brew,nandub/brew,ilovezfs/brew,aw1621107/brew,bfontaine/brew,AnastasiaSulyagina/brew,konqui/brew,AnastasiaSulyagina/brew,gordonmcshane/homebrew,maxim-belkin/brew,Linuxbrew/brew,claui/brew,claui/brew,Linuxbrew/brew,MikeMcQuaid/brew,mgrimes/brew,aw1621107/brew,konqui/brew,jmsundar/brew,tonyg/homebrew,reelsense/brew,vitorgalvao/brew,pseudocody/brew,muellermartin/dist,amar-laksh/brew_sudo,pseudocody/brew,maxim-belkin/brew,claui/brew,muellermartin/dist,staticfloat/brew,sjackman/homebrew,Linuxbrew/brew,reelsense/brew,hanxue/linuxbrew,DomT4/brew,mahori/brew,jmsundar/brew,amar-laksh/brew_sudo,EricFromCanada/brew,nandub/brew,reitermarkus/brew,rwhogg/brew,ilovezfs/brew,reitermarkus/brew,bfontaine/brew,tonyg/homebrew,claui/brew,mahori/brew,JCount/brew,maxim-belkin/brew,mgrimes/brew,amar-laksh/brew_sudo,rwhogg/brew,reitermarkus/brew,tonyg/homebrew,alyssais/brew,nandub/brew,mgrimes/brew,DomT4/brew,alyssais/brew,Homebrew/brew,hanxue/linuxbrew,JCount/brew,pseudocody/brew,toonetown/homebrew,AnastasiaSulyagina/brew,Homebrew/brew,JCount/brew,toonetown/homebrew,Homebrew/brew,staticfloat/brew,staticfloat/brew,zmwangx/brew,mistydemeo/homebrew,mistydemeo/homebrew,gregory-nisbet/brew,bfontaine/brew,gregory-nisbet/brew,palxex/brew,reelsense/brew,konqui/brew