Removing unnecessary cleanup in "Listing Versions" tests.

test/fast/Listing versions/Running "nvm ls system" should include "system" when appropriate

@@ -1,7 +1,6 @@
 #!/bin/sh
 
-cleanup () { unset -f nvm_has_system_node; }
-die () { cleanup ; echo $@ ; exit 1; }
+die () { echo $@ ; exit 1; }
 
 . ../../../nvm.sh
 

test/fast/Listing versions/Running "nvm ls" should filter out "versions"

@@ -2,13 +2,10 @@
 
 mkdir ../../../v0.1.3
 mkdir ../../../v0.2.3
+mkdir ../../../versions
 
 . ../../../nvm.sh
 
-mkdir ../../../versions
-
 [ -z "$(nvm ls | \grep 'versions')" ]
 # The result should contain only the appropriate version numbers.
 
-rmdir ../../../versions
-