Remove obsolete guards around canonical_name return value

Library/Homebrew/cmd/edit.rb

@@ -27,12 +27,8 @@ module Homebrew extend self
       # Don't use ARGV.formulae as that will throw if the file doesn't parse
       paths = ARGV.named.map do |name|
         name = Formula.canonical_name name
-        if name.include? '/'
-          Pathname.new(name)
-        else
         Formula.path(name)
       end
-      end
       unless ARGV.force?
         paths.each do |path|
           raise FormulaUnavailableError, path.basename('.rb').to_s unless path.file?

Library/Homebrew/cmd/uninstall.rb

@@ -18,10 +18,6 @@ module Homebrew extend self
     else
       ARGV.named.each do |name|
         name = Formula.canonical_name(name)
-
-        # FIXME canonical_name is insane
-        raise "Invalid usage" if name.include? '/'
-
         rack = HOMEBREW_CELLAR/name
 
         if rack.directory?

Library/Homebrew/extend/ARGV.rb

@@ -19,16 +19,9 @@ module HomebrewArgvExtension
     require 'formula'
     @kegs ||= downcased_unique_named.collect do |name|
       canonical_name = Formula.canonical_name(name)
-
-      if canonical_name.include? "/"
-        # canonical_name returns a path if it was a formula installed via a
-        # URL. And we only want the name. FIXME that function is insane.
-        rack = HOMEBREW_CELLAR/Pathname.new(canonical_name).stem
-      else
       rack = HOMEBREW_CELLAR/canonical_name
-      end
-
       dirs = rack.directory? ? rack.subdirs : []
+
       raise NoSuchKegError.new(rack.basename.to_s) if not rack.directory? or dirs.empty?
 
       linked_keg_ref = HOMEBREW_REPOSITORY/"Library/LinkedKegs"/name