uninstall no longer depends uses homebrew

- should make tests a bit more reliable

lib/cask/cli/uninstall.rb

@@ -2,7 +2,9 @@ class Cask::CLI::Uninstall
   def self.run(*cask_names)
     begin
       casks = cask_names.map { |cn| Cask.load(cn) }
-      Cask::Installer.uninstall(*casks)
+      casks.each do |cask|
+        Cask::Installer.uninstall(cask)
+      end
     rescue CaskUnavailableError,CaskNotInstalledError => e
       onoe e
     end

lib/cask/installer.rb

@@ -14,17 +14,10 @@ class Cask::Installer
       ohai "Success! #{cask} installed to #{cask.destination_path}"
     end
 
-    def uninstall(*casks)
-      casks.each do |cask|
-        raise CaskNotInstalledError.new(cask) unless cask.installed?
-      end
+    def uninstall(cask)
+      raise CaskNotInstalledError.new(cask) unless cask.installed?
 
-      require 'cmd/uninstall'
-      ARGV.clear
-      casks.each do |cask|
-        ARGV << cask.title
-      end
-      Homebrew.uninstall
+      cask.destination_path.rmtree
     end
 
     def _with_extracted_mountpoints(path)

test/cli/uninstall_test.rb

@@ -25,19 +25,13 @@ describe Cask::CLI::Uninstall do
   end 
 
   it "can uninstall multiple casks at once" do
-    caffeine = Cask.load('caffeine')
-    anvil = Cask.load('anvil')
-
-    shutup do
-      Cask::Installer.install(caffeine)
-      Cask::Installer.install(anvil)
+    Cask::Installer.expects(:uninstall).with do |cask|
+      cask.title == 'caffeine'
     end
-
-    shutup do
-      Cask::CLI::Uninstall.run('caffeine', 'anvil')
+    Cask::Installer.expects(:uninstall).with do |cask|
+      cask.title == 'anvil'
     end
 
-    caffeine.wont_be :installed?
-    anvil.wont_be :installed?
+    Cask::CLI::Uninstall.run('caffeine', 'anvil')
   end
 end