diff -r 342bebadd075 -r 88c486951f10 thirdparty/python-graph/graph/sorting.py
--- a/thirdparty/python-graph/graph/sorting.py	Sun Nov 30 16:39:18 2008 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,49 +0,0 @@
-# Copyright (c) 2007-2008 Pedro Matiello <pmatiello@gmail.com>
-#
-# Permission is hereby granted, free of charge, to any person
-# obtaining a copy of this software and associated documentation
-# files (the "Software"), to deal in the Software without
-# restriction, including without limitation the rights to use,
-# copy, modify, merge, publish, distribute, sublicense, and/or sell
-# copies of the Software, and to permit persons to whom the
-# Software is furnished to do so, subject to the following
-# conditions:
-
-# The above copyright notice and this permission notice shall be
-# included in all copies or substantial portions of the Software.
-
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
-# OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
-# HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
-# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
-# OTHER DEALINGS IN THE SOFTWARE.
-
-
-"""
-Sorting algorithms for python-graph.
-
-@sort: topological_sorting
-"""
-
-
-# Topological sorting
-
-def topological_sorting(graph):
-	"""
-	Topological sorting.
-
-	@attention: Topological sorting is meaningful only for directed acyclic graphs.
-
-	@type  graph: graph
-	@param graph: Graph.
-
-	@rtype:  list
-	@return: Topological sorting for the graph.
-	"""
-	# The topological sorting of a DAG is equivalent to its reverse postordering.
-	tmp, tmp, post = graph.depth_first_search()
-	post.reverse()
-	return post