tests: don't try to rm an unexisting file
tests: don't try to rm an unexisting file

This line is necessary if the test fails. If it passes the file won't
exist anymore and shouldn't be removed.

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