Revert "Added Tango colors to palette"

Tango icons are in its own tango.soc palette. No
need to add them to the standard palette.

This reverts commit b9c98414.

Change-Id: Id19d869ce8744cf55e64f4d003b8011f9df0023f
Reviewed-on: https://gerrit.libreoffice.org/3738Reviewed-by: Tor Lillqvist <tml@iki.fi>
Tested-by: Tor Lillqvist <tml@iki.fi>

extras/source/palettes/standard.soc

@@ -100,6 +100,4 @@
   <draw:color draw:name="Chart 10" draw:color="#ff950e"/>
   <draw:color draw:name="Chart 11" draw:color="#c5000b"/>
   <draw:color draw:name="Chart 12" draw:color="#0084d1"/>
-  <draw:color draw:name="Tango: Sky Blue 1" draw:color="#729fcf" />
-  <draw:color draw:name="Tango: Sky Blue 2" draw:color="#3465a4" />
 </office:color-table>