diff --git a/public/images/collapse.gif b/public/images/collapse.gif
deleted file mode 100644
index 01e691450c4..00000000000
Binary files a/public/images/collapse.gif and /dev/null differ
diff --git a/public/images/expand.gif b/public/images/expand.gif
deleted file mode 100644
index 1b24ef1248d..00000000000
Binary files a/public/images/expand.gif and /dev/null differ
diff --git a/public/js/tree_grid.css b/public/js/tree_grid.css
deleted file mode 100644
index 5fe599569c4..00000000000
--- a/public/js/tree_grid.css
+++ /dev/null
@@ -1,21 +0,0 @@
-.cell-title {
-	font-weight: bold;
-}
-
-.cell-effort-driven {
-	text-align: center;
-}
-
-.toggle {
-	height: 9px;
-	width: 9px;
-	display: inline-block;
-}
-
-.toggle.expand {
-	background: url(app/images/expand.gif) no-repeat center center;
-}
-
-.toggle.collapse {
-	background: url(app/images/collapse.gif) no-repeat center center;
-}
\ No newline at end of file