diff --git a/libraries/CMSIS/Documentation/General/html/tabs.css b/libraries/CMSIS/Documentation/General/html/tabs.css
deleted file mode 100644
--- a/libraries/CMSIS/Documentation/General/html/tabs.css
+++ /dev/null
@@ -1,71 +0,0 @@
-.tabs, .tabs1, .tabs2, .tabs3 {
-    background-image: url('tab_b.png');
-    width: 100%;
-    z-index: 101;
-    font-size: 10px;
-}
-
-.tabs1 {
-    background-image: url('tab_topnav.png');
-    font-size: 12px;
-}
-
-.tabs2 {
-    font-size: 10px;
-}
-.tabs3 {
-    font-size: 9px;
-}
-
-.tablist {
-    margin: 0;
-    padding: 0;
-    display: table;
-    line-height: 24px;
-}
-
-.tablist li {
-    float: left;
-    display: table-cell;
-    background-image: url('tab_b.png');
-    list-style: none;
-}
-
-.tabs1 .tablist li {
-    float: left;
-    display: table-cell;
-    background-image: url('tab_topnav.png');
-    list-style: none;
-}
-
-.tablist a {
-    display: block;
-    padding: 0 20px;
-    font-weight: bold;
-    background-image:url('tab_s.png');
-    background-repeat:no-repeat;
-    background-position:right;
-    color: #283A5D;
-    text-shadow: 0px 1px 1px rgba(255, 255, 255, 0.9);
-    text-decoration: none;
-    outline: none;
-}
-
-.tabs3 .tablist a {
-    padding: 0 10px;
-}
-
-.tablist a:hover {
-    background-image: url('tab_h.png');
-    background-repeat:repeat-x;
-    color: #fff;
-    text-shadow: 0px 1px 1px rgba(0, 0, 0, 1.0);
-    text-decoration: none;
-}
-
-.tablist li.current a {
-    background-image: url('tab_a.png');
-    background-repeat:repeat-x;
-    color: #fff;
-    text-shadow: 0px 1px 1px rgba(0, 0, 0, 1.0);
-}