Revert "Override partial installs by default" (#3918)

* Revert "Override partial installs by default (#3530)"

This reverts commit a65c37f15d.

var/spack/repos/builtin.mock/packages/canfail/package.py

@@ -1,41 +0,0 @@
-##############################################################################
-# Copyright (c) 2013-2016, Lawrence Livermore National Security, LLC.
-# Produced at the Lawrence Livermore National Laboratory.
-#
-# This file is part of Spack.
-# Created by Todd Gamblin, tgamblin@llnl.gov, All rights reserved.
-# LLNL-CODE-647188
-#
-# For details, see https://github.com/llnl/spack
-# Please also see the LICENSE file for our notice and the LGPL.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License (as
-# published by the Free Software Foundation) version 2.1, February 1999.
-#
-# 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 terms and
-# conditions of the GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser 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 spack import *
-
-
-class Canfail(Package):
-    """Package which fails install unless a special attribute is set"""
-
-    homepage = "http://www.example.com"
-    url      = "http://www.example.com/a-1.0.tar.gz"
-
-    version('1.0', '0123456789abcdef0123456789abcdef')
-
-    def install(self, spec, prefix):
-        try:
-            getattr(self, 'succeed')
-            touch(join_path(prefix, 'an_installation_file'))
-        except AttributeError:
-            raise InstallError()