Remove adobe-digital-editions2 (#4586)

Casks/adobe-digital-editions2.rb

@@ -1,13 +0,0 @@
-cask 'adobe-digital-editions2' do
-  version '2.0.1'
-  sha256 'dcaec3e2cbb2faa7720a2ff06d13af4fe0433cdf991c76eeeed28cb0019b69c0'
-
-  url 'http://download.adobe.com/pub/adobe/digitaleditions/ADE_2.0_Installer.dmg'
-  name 'Adobe Digital Editions 2.0.1'
-  homepage 'https://www.adobe.com/solutions/ebook/digital-editions.html'
-
-  pkg 'Digital Editions 2.0 Installer.pkg', allow_untrusted: true
-
-  uninstall pkgutil: 'com.adobe.adobedigitaleditions.app',
-            delete:  '/Applications/Adobe Digital Editions.app'
-end