Bug 26070: Remove GoogleIndicTransliteration system preference

Bug 26070: Remove GoogleIndicTransliteration system preference

The Google Transliterate API was deprecated on May 26, 2011. This patch
removes the feature and associated system preference.

To test, apply the patch and run the database update process.

 - Go to Administration -> System preferences and search for
   'GoogleIndicTransliteration.' There should be no results.
 - Search the Koha codebase for references to
   'GoogleIndicTransliteration.' There should be no current references..

Signed-off-by: Amit Gupta <amit.gupta@informaticsglobal.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>