Removew brew-which

This functionality is better handled by brew list --versions
and other official commands.

Library/Contributions/cmd/brew-which.rb

@@ -1,44 +0,0 @@
-require 'extend/pathname'
-
-module Homebrew
-  def which_versions which_brews=nil
-    brew_links = Array.new
-    version_map = Hash.new
-
-    real_cellar = HOMEBREW_CELLAR.realpath
-
-    (HOMEBREW_PREFIX/'opt').subdirs.each do |path|
-      next unless path.symlink? && path.resolved_path_exists?
-      brew_links << Pathname.new(path.realpath)
-    end
-
-    brew_links = brew_links.collect{|p|p.relative_path_from(real_cellar).to_s}.reject{|p|p.start_with?("../")}
-
-    brew_links.each do |p|
-      parts = p.split("/")
-      next if parts.count < 2 # Shouldn't happen for normally installed brews
-      brew = parts.shift
-      version = parts.shift
-
-      next unless which_brews.include? brew if which_brews
-
-      versions = version_map[brew] || []
-      versions << version unless versions.include? version
-      version_map[brew] = versions
-    end
-
-    return version_map
-  end
-
-  def which
-    which_brews = ARGV.named.empty? ? nil : ARGV.named
-
-    brews = which_versions which_brews
-    brews.keys.sort.each do |b|
-      puts "#{b}: #{brews[b].sort*' '}"
-    end
-    puts
-  end
-end
-
-Homebrew.which