[CHANGESET] Drop deprecated key from desktop file

[John W. Eaton]

On  9-Apr-2008, Rafael Laboissiere wrote:

| The Encoding key is now deprecated by the FreeDesktop standard [1] and all
| strings are required to be encoded in UTF-8.
| 
| The trivial changeset attached below fixes this.
| 
| [1] http://standards.freedesktop.org/desktop-entry-spec/1.0/apc.html

I applied it.

Thanks,

jwe