requirements: remove unneeded Python27Dependency.
requirements: remove unneeded Python27Dependency.

PythonDependency now implies this.

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