Delete tree.css

tree.css

@@ -1,15 +0,0 @@
-.node circle {
-    fill: #fff;
-    stroke: black;
-    stroke-width: 2px;
-}
-
-.node text {
-    font: 12px sans-serif;
-}
-
-.link {
-    fill: none;
-
-    stroke-width: 2px;
-}