Removed truecrypt71a.rb

Since truecrypt was removed from the main repo to caskroom/unofficial in
a "downloader beware" capacity, it makes no sense to have it in
caskroom/versions

Casks/truecrypt71a.rb

@@ -1,17 +0,0 @@
-cask :v1 => 'truecrypt71a' do
-  version '7.1a'
-  sha256 '04db58b737c05bb6b0b83f1cb37a29edec844b59ff223b9e213ee1f4e287f586'
-
-  url "https://github.com/DrWhax/truecrypt-archive/raw/231bb2f64564a087de338a68fb9498320eecfe2a/TrueCrypt%20#{version}%20Mac%20OS%20X.dmg"
-  homepage 'http://truecrypt.sourceforge.net/'
-  license :oss
-
-  pkg  "TrueCrypt #{version}.mpkg"
-  caveats do
-    files_in_usr_local
-    <<-EOS.undent
-    Warning: TrueCrypt IS NOT SECURE and the development was ended, see more:
-      http://truecrypt.sourceforge.net/
-    EOS
-  end
-end