[Fedora-packaging] Remove "Encoding=UTF-8" from sample desktop file

[Milos Jakubicek]

Hi,

yesterday when reviewing a package I noticed that although we have a 
MUST: follow the desktop-entry-spec in the Guidelines, the example on 
that page includes a line with:

Encoding=UTF-8

which is deprecated according to:
http://standards.freedesktop.org/desktop-entry-spec/desktop-entry-spec-latest.html#legacy-mixed

We should get rid of that line, as some people (including me) are taking 
  that sample as a basis when creating new desktop files, shouldn't we?

Regards,
Milos Jakubicek