Revert r12348 since it's not really needed and the previous version is more
efficient.

svn path=/main/trunk/; revision=12352
diff --git a/pym/_emerge/__init__.py b/pym/_emerge/__init__.py
index 880d9cb..c03e608 100644
--- a/pym/_emerge/__init__.py
+++ b/pym/_emerge/__init__.py
@@ -6838,7 +6838,7 @@
 					selected_nodes = list(selected_nodes)
 				selected_nodes.sort(cmp_circular_bias)
 
-			if not selected_nodes and myblocker_uninstalls.leaf_nodes():
+			if not selected_nodes and not myblocker_uninstalls.is_empty():
 				# An Uninstall task needs to be executed in order to
 				# avoid conflict if possible.
 				min_parent_deps = None