diff --git a/IPython/html/static/base/less/flexbox.less b/IPython/html/static/base/less/flexbox.less
index cb3acb4..5a802b8 100644
--- a/IPython/html/static/base/less/flexbox.less
+++ b/IPython/html/static/base/less/flexbox.less
@@ -102,8 +102,6 @@
box-pack: center;
}
-/* Code below was added on 11/6/2013 by Jonathan Frederic */
-
.align-start {
-webkit-box-align: start;
-moz-box-align: start;