Delete firefoxdeveloperedition.rb (#3939)

Casks/firefoxdeveloperedition.rb

@@ -1,38 +0,0 @@
-cask 'firefoxdeveloperedition' do
-  version :latest
-  sha256 :no_check
-
-  language 'de' do
-    'de'
-  end
-
-  language 'en', default: true do
-    'en-US'
-  end
-
-  language 'ja' do
-    'ja-JP-mac'
-  end
-
-  language 'ru' do
-    'ru'
-  end
-
-  language 'uk' do
-    'uk'
-  end
-
-  language 'zh-TW' do
-    'zh-TW'
-  end
-
-  language 'zh' do
-    'zh-CN'
-  end
-
-  url "https://download.mozilla.org/?product=firefox-aurora-latest-#{language == 'en-US' ? 'ssl' : 'l10n'}&os=osx&lang=#{language}"
-  name 'Mozilla Firefox Developer Edition'
-  homepage 'https://www.mozilla.org/firefox/developer/'
-
-  app 'FirefoxDeveloperEdition.app'
-end