Simplify cask search

The cask_tokens and cask_names arrays here
were almost identical so we'll just use
cask_tokens for both.

Library/Homebrew/cask/cask.rb

@@ -38,16 +38,6 @@ module Cask
       end.compact
     end
 
-    def self.full_names
-      Tap.flat_map do |tap|
-        next tap.cask_tokens.blank?
-        next tap.cask_tokens if tap.user == "Homebrew"
-
-        name = tap.name
-        tap.cask_tokens.map { |tok| "#{name}/#{tok}" }
-      end.flatten
-    end
-
     def tap
       return super if block_given? # Object#tap
 

Library/Homebrew/extend/os/mac/search.rb

@@ -37,8 +37,7 @@ module Homebrew
         results = cask_tokens.extend(Searchable)
                              .search(string_or_regex)
 
-        cask_names = Cask::Cask.full_names
-        results += DidYouMean::SpellChecker.new(dictionary: cask_names)
+        results += DidYouMean::SpellChecker.new(dictionary: cask_tokens)
                                            .correct(string_or_regex)
 
         results.sort.map do |name|