Delete totalfinder-beta.rb

v1.7.10 is already stable and development appears to have ceased since
the introduction of SIP in 10.11.

Casks/totalfinder-beta.rb

@@ -1,15 +0,0 @@
-cask 'totalfinder-beta' do
-  version '1.7.10'
-  sha256 '18bc9083a556063a6650f7a18cfd5a763139383c89d8fef7356831e53812807e'
-
-  url "http://downloads.binaryage.com/TotalFinder-#{version}.dmg"
-  homepage 'http://totalfinder.binaryage.com/beta-changes'
-  license :commercial
-
-  pkg 'TotalFinder.pkg'
-  uninstall :pkgutil => 'com.binaryage.pkg.totalfinder.app',
-            :script => {
-                        :executable => 'TotalFinder Uninstaller.app/Contents/MacOS/TotalFinder Uninstaller',
-                        :args => %w[--headless],
-                       }
-end