[GTK] Remove pango from optional jhbuild dependencies
https://bugs.webkit.org/show_bug.cgi?id=115162

Patch by Eduardo Lima Mitev <elima@igalia.com> on 2013-04-25
Reviewed by Martin Robinson.

Pango is not needed since revision r148293 that lowers the pango
dependency to 1.30, which is available in most distributions.

* gtk/jhbuild-optional.modules: Removes description of pango module.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@149108 268f45cc-cd09-0410-ab3c-d52691b4dbfc