Fix uninstall.rb `brew remove --force` "Directory not empty" error
Fix uninstall.rb `brew remove --force` "Directory not empty" error

Finder activity such as moving the position of an icon can create an unexpected
.DS_Store file in a Cellar directory. This causes `brew remove --force` to throw
an error that is reported as

Error: Directory not empty - /usr/local/Cellar/<formula>

This fix avoids that error, by calling rmtree rather than rmdir.

Signed-off-by: Adam Vandenberg <34c2b6407fd5a10249a15d699d40f9ed1782e98c@gmail.com>

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