audit: Remove FILEUTILS_METHODS constant
audit: Remove FILEUTILS_METHODS constant

This constant hasn't been used since there was an `audit_line`
method, and as such is vestigial.

MikeMcQuaid/brew,alyssais/brew,vitorgalvao/brew,alyssais/brew,reitermarkus/brew,claui/brew,ilovezfs/brew,reitermarkus/brew,MikeMcQuaid/brew,DomT4/brew,konqui/brew,Homebrew/brew,vitorgalvao/brew,nandub/brew,MikeMcQuaid/brew,maxim-belkin/brew,Linuxbrew/brew,alyssais/brew,EricFromCanada/brew,ilovezfs/brew,reitermarkus/brew,nandub/brew,maxim-belkin/brew,Linuxbrew/brew,JCount/brew,mahori/brew,MikeMcQuaid/brew,hanxue/linuxbrew,EricFromCanada/brew,hanxue/linuxbrew,claui/brew,vitorgalvao/brew,konqui/brew,mgrimes/brew,mahori/brew,DomT4/brew,claui/brew,nandub/brew,DomT4/brew,vitorgalvao/brew,claui/brew,hanxue/linuxbrew,Homebrew/brew,maxim-belkin/brew,sjackman/homebrew,reelsense/brew,sjackman/homebrew,Linuxbrew/brew,nandub/brew,mgrimes/brew,mgrimes/brew,EricFromCanada/brew,Homebrew/brew,mahori/brew,reelsense/brew,ilovezfs/brew,sjackman/homebrew,konqui/brew,JCount/brew,Homebrew/brew,EricFromCanada/brew,JCount/brew,JCount/brew,sjackman/homebrew,reitermarkus/brew,Linuxbrew/brew,reelsense/brew,mahori/brew,DomT4/brew,konqui/brew