doc: remove all scrollbar styling

Returns the doc custom scrollbar to native style. Fixes: #6443 PR-URL: #6479 Reviewed-By: Robert Lindstaedt <[email protected]> Reviewed-By: Roman Reiss <[email protected]> Reviewed-By: Сковорода Никита Андреевич <[email protected]>

Author: claudiorodriguez

doc/api_assets/style.css

@@ -55,35 +55,6 @@ em code{
 font-style: normal;
 }
 
-::-webkit-scrollbar{
--webkit-appearance: none;
-}
-
-::-webkit-scrollbar-button{
-display: none;
-}
-
-::-webkit-scrollbar-track{
-background:#fff;
-}
-
-::-webkit-scrollbar-thumb{
-min-height:48px;
-background:#d2d2d2;
-background-clip: padding-box;
-border:3px solid #fff;
-border-radius:5px;
-}
-
-::-webkit-scrollbar-thumb:active{
-background:#888;
-border-width:2px;
-}
-
-::-webkit-scrollbar{
-width:10px;
-}
-
 #changelog#gtoc{
 display: none;
 }