Remove deprecated recipe

slapos/recipe/README.helloworld.txt

-helloworld
-==========
-
-It only installs a dummy wrapper saying "Hello World!" and sends to the master an "HelloWorld" parameter.

slapos/recipe/helloworld.py

-##############################################################################
-#
-# Copyright (c) 2010 Vifib SARL and Contributors. All Rights Reserved.
-#
-# WARNING: This program as such is intended to be used by professional
-# programmers who take the whole responsibility of assessing all potential
-# consequences resulting from its eventual inadequacies and bugs
-# End users who are looking for a ready-to-use solution with commercial
-# guarantees and support are strongly adviced to contract a Free Software
-# Service Company
-#
-# This program is Free Software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public License
-# as published by the Free Software Foundation; either version 3
-# of the License, or (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
-#
-##############################################################################
-from slapos.recipe.librecipe import BaseSlapRecipe
-
-class Recipe(BaseSlapRecipe):
-
-  def _install(self):
-    parameter_dict = self.computer_partition.getInstanceParameterDict()
-    dummy_wrapper = self.createRunningWrapper('dummy', """#!/bin/sh
-while [ true ]
-do
-   sleep 10
-   echo "Hello World!"
-done""")
-
-    self.computer_partition.setConnectionDict(dict(
-      hello_world="Hello World!",
-      ))
-    return [dummy_wrapper]
-    
\ No newline at end of file