Index: category-template.php
===================================================================
--- category-template.php	(revision 21789)
+++ category-template.php	(working copy)
@@ -353,12 +353,6 @@
 			$output .= "\t<option value='0'$selected>$show_option_all</option>\n";
 		}
 
-		if ( $show_option_none ) {
-			$show_option_none = apply_filters( 'list_cats', $show_option_none );
-			$selected = ( '-1' === strval($r['selected']) ) ? " selected='selected'" : '';
-			$output .= "\t<option value='-1'$selected>$show_option_none</option>\n";
-		}
-
 		if ( $hierarchical )
 			$depth = $r['depth'];  // Walk the full depth.
 		else