diff --git a/IPython/frontend/html/notebook/static/css/tooltip.css b/IPython/frontend/html/notebook/static/css/tooltip.css
index 2ec102b..9381393 100644
--- a/IPython/frontend/html/notebook/static/css/tooltip.css
+++ b/IPython/frontend/html/notebook/static/css/tooltip.css
@@ -2,16 +2,7 @@
  * Primary styles
  *
  * Author: IPython Development Team
- */
-/**
- * WARNING IF YOU ARE EDITTING THIS FILE, 
- * if this is a .css file, It has a lot of chance of beeing generated from the
- * ../css/[samename].less file, it might not stay a less file forever, 
- * but as until now it is convenient to developp using less
- * 
- * it it's a less file, don't forget to recompile it 
- */
-/*
+ *
  * We'll try to get something prety, so we
  * have some strange ccs to have the scroll bar on
  * the left of the left with fix button on the top right of the tooltip
diff --git a/IPython/frontend/html/notebook/static/less/tooltip.less b/IPython/frontend/html/notebook/static/less/tooltip.less
deleted file mode 100644
index c9b3ec0..0000000
--- a/IPython/frontend/html/notebook/static/less/tooltip.less
+++ /dev/null
@@ -1,186 +0,0 @@
-/**
- * Primary styles
- *
- * Author: IPython Development Team
- */
-
-/**
- * WARNING IF YOU ARE EDITTING THIS FILE, 
- * if this is a .css file, It has a lot of chance of beeing generated from the
- * ../css/[samename].less file, it might not stay a less file forever, 
- * but as until now it is convenient to developp using less
- * 
- * it it's a less file, don't forget to recompile it 
- */
-/*
- * We'll try to get something prety, so we
- * have some strange ccs to have the scroll bar on
- * the left of the left with fix button on the top right of the tooltip
- */
-
-// double slash comment are remove by less compilation
-// **
-// * Less mixins
-// **/
-
-// Four color of the background
-@c1 : rgb(215,215,215);
-@c2 : rgb(210,210,210);
-@c3 : rgb(227,227,227);
-@c4 : rgb(247,247,247);
-@bordercolor : #BBB;
-@borderwidth : 1px;
-@textColor : #000;
-
-// smoth height adaptation
-.smoothheight(@t:1s) {
-    -webkit-transition-property: height;
-    -webkit-transition-duration: 1s;
-    -moz-transition-property: height;
-    -moz-transition-duration: 1s;
-    transition-property: height;
-    transition-duration: 1s;
-}
-
-@-moz-keyframes fadeOut {
-    from {opacity:1;}
-    to {opacity:0;}
-}
-
-@-webkit-keyframes fadeOut {
-    from {opacity:1;}
-    to {opacity:0;}
-}
-
-//@keyframes fadeOut {
-//    from {opacity:1;}
-//    to {opacity:0;}
-//}
-
-@-moz-keyframes fadeIn {
-    from {opacity:0;}
-    to {opacity:1;}
-}
-
-@-webkit-keyframes fadeIn {
-    from {opacity:0;}
-    to {opacity:1;}
-}
-
-//@keyframes fadeIn {
-//    from {opacity:0;}
-//    to {opacity:1;}
-//}
-
-.linearGradient(@stop1:0, @color1:#ccc, @stop2:33%, @color2:#ddd, @stop3:66%, @color3:#ccc, @stop4:100%, @color4:#ddd){ 
-  background-color:@color4;
-  background-image: -webkit-linear-gradient(center bottom, @color1 @stop1, @color2 @stop2, @color3 @stop3, @color4 @stop4);
-  background-image: -webkit-gradient(
-      linear,
-      left bottom,
-      left top,
-      color-stop(@stop1, @color1),
-      color-stop(@stop2, @color2),
-      color-stop(@stop3, @color3),
-      color-stop(@stop4, @color4)
-  );
-  background-image:-moz-linear-gradient(center bottom, @color1 @stop1, @color2 @stop2, @color3 @stop3, @color4 @stop4);
-  background-image:-ms-linear-gradient(center bottom, @color1 @stop1, @color2 @stop2, @color3 @stop3, @color4 @stop4);
-  background-image:-o-linear-gradient(center bottom, @color1 @stop1, @color2 @stop2, @color3 @stop3, @color4 @stop4);
-  background-image:linear-gradient(center bottom, @color1 @stop1, @color2 @stop2, @color3 @stop3, @color4 @stop4); 
-
-}
-
-.tooltip a {
-    float:right;
-}
-
-/*properties of tooltip after "expand"*/
-.bigtooltip {
-    overflow: auto;
-    height: 200px;
-    .smoothheight();
-}
-
-/*properties of tooltip before "expand"*/
-.smalltooltip{
-    .smoothheight();
-    text-overflow: ellipsis;
-    overflow: hidden;
-    height:80px;
-}
-.tooltipbuttons
-{
-    position: absolute;
-    padding-right : 15px;
-    top : 0px;
-    right:0px;
-}
-.tooltiptext
-{   
-    /*avoid the button to overlap on some docstring*/
-    padding-right:30px
-}
-
-.tooltip {
-    max-width:700px;
-    border-radius: 10px 10px 10px 10px;
-    box-shadow: 3px 3px 5px #999;
-    /*fade-in animation when inserted*/
-    -webkit-animation: fadeOut 800ms;
-    -moz-animation: fadeOut 800ms;
-    animation: fadeOut 800ms;
-    -webkit-animation: fadeIn 800ms;
-    -moz-animation: fadeIn 800ms;
-    animation: fadeIn 800ms;
-    vertical-align: middle;
-    
-    .linearGradient(13%,@c1, 39%, @c2 , 56%,@c3, 91% , @c4) ;
-    overflow : visible;
-    color: @textColor;
-    border: @bordercolor @borderwidth solid;
-    outline: none;
-    padding: 3px;
-    margin: 0px;
-    padding-left:7px;
-    font-family: monospace;
-    min-height:50px;
-    position: absolute;
-}
-
-
-.pretooltiparrow {
-  left: 0px;
-  margin: 0px;
-  top: -16px;
-  width: 40px;
-  height: 16px;
-  overflow: hidden;
-  position: absolute;
-
-}
-.pretooltiparrow:before {
-  background-color : @c4;
-  border : @borderwidth @bordercolor solid; 
-  z-index:11;
-  content: "";
-  position: absolute;
-  left: 15px;
-  top: 10px;
-  width: 25px;
-  height: 25px;
-  @theta : 45deg;
-  -webkit-transform: rotate(@theta);
-  -moz-transform:    rotate(@theta);
-  -ms-transform:     rotate(@theta);
-  -o-transform:      rotate(@theta);
-
-}
-
-.tooltip.hide
-{
-    -webkit-animation: fadeOut 800ms;
-    -moz-animation: fadeOut 800ms;
-    animation: fadeOut 800ms;
-    opacity : 0;
-}