Remove useless warnings from the test suite

Nobody looks at these anyway.
--- libscalar-listify-perl.orig/test.pl
+++ libscalar-listify-perl/test.pl
@@ -18,10 +18,3 @@
 # (correspondingly "not ok 13") depending on the success of chunk 13
 # of the test code):
 
-my $scalar = 'ho there';
-my $aref   = [qw(a ref array ref got to go)];
-
-use Data::Dumper;
-
-warn Dumper(listify_aref($scalar));
-warn Dumper(listify_aref($aref));
