diff --git a/css/index.html b/css/index.html
index 1ba4471ddd..a293420d2e 100644
--- a/css/index.html
+++ b/css/index.html
@@ -2873,29 +2873,29 @@ To edit settings, press <span class="nt">&lt;kbd&gt;&lt;kbd&gt;</span>ctrl<span
     </div>
   </div>
   <div class="row responsive-utilities-test visible-on">
-    <div class="col-xs-6 col-sm-6">
+    <div class="col-xs-6">
       <span class="hidden-xs hidden-sm">Extra small and small</span>
       <span class="visible-xs-block visible-sm-block">&#10004; Visible on x-small and small</span>
     </div>
-    <div class="col-xs-6 col-sm-6">
+    <div class="col-xs-6">
       <span class="hidden-md hidden-lg">Medium and large</span>
       <span class="visible-md-block visible-lg-block">&#10004; Visible on medium and large</span>
     </div>
     <div class="clearfix visible-xs-block"></div>
-    <div class="col-xs-6 col-sm-6">
+    <div class="col-xs-6">
       <span class="hidden-xs hidden-md">Extra small and medium</span>
       <span class="visible-xs-block visible-md-block">&#10004; Visible on x-small and medium</span>
     </div>
-    <div class="col-xs-6 col-sm-6">
+    <div class="col-xs-6">
       <span class="hidden-sm hidden-lg">Small and large</span>
       <span class="visible-sm-block visible-lg-block">&#10004; Visible on small and large</span>
     </div>
     <div class="clearfix visible-xs-block"></div>
-    <div class="col-xs-6 col-sm-6">
+    <div class="col-xs-6">
       <span class="hidden-xs hidden-lg">Extra small and large</span>
       <span class="visible-xs-block visible-lg-block">&#10004; Visible on x-small and large</span>
     </div>
-    <div class="col-xs-6 col-sm-6">
+    <div class="col-xs-6">
       <span class="hidden-sm hidden-md">Small and medium</span>
       <span class="visible-sm-block visible-md-block">&#10004; Visible on small and medium</span>
     </div>
@@ -2923,29 +2923,29 @@ To edit settings, press <span class="nt">&lt;kbd&gt;&lt;kbd&gt;</span>ctrl<span
     </div>
   </div>
   <div class="row responsive-utilities-test hidden-on">
-    <div class="col-xs-6 col-sm-6">
+    <div class="col-xs-6">
       <span class="hidden-xs hidden-sm">Extra small and small</span>
       <span class="visible-xs-block visible-sm-block">&#10004; Hidden on x-small and small</span>
     </div>
-    <div class="col-xs-6 col-sm-6">
+    <div class="col-xs-6">
       <span class="hidden-md hidden-lg">Medium and large</span>
       <span class="visible-md-block visible-lg-block">&#10004; Hidden on medium and large</span>
     </div>
     <div class="clearfix visible-xs-block"></div>
-    <div class="col-xs-6 col-sm-6">
+    <div class="col-xs-6">
       <span class="hidden-xs hidden-md">Extra small and medium</span>
       <span class="visible-xs-block visible-md-block">&#10004; Hidden on x-small and medium</span>
     </div>
-    <div class="col-xs-6 col-sm-6">
+    <div class="col-xs-6">
       <span class="hidden-sm hidden-lg">Small and large</span>
       <span class="visible-sm-block visible-lg-block">&#10004; Hidden on small and large</span>
     </div>
     <div class="clearfix visible-xs-block"></div>
-    <div class="col-xs-6 col-sm-6">
+    <div class="col-xs-6">
       <span class="hidden-xs hidden-lg">Extra small and large</span>
       <span class="visible-xs-block visible-lg-block">&#10004; Hidden on x-small and large</span>
     </div>
-    <div class="col-xs-6 col-sm-6">
+    <div class="col-xs-6">
       <span class="hidden-sm hidden-md">Small and medium</span>
       <span class="visible-sm-block visible-md-block">&#10004; Hidden on small and medium</span>
     </div>