Merge pull request lichess-org#6977 from d10n/hide-lobby-graph-scrollbar

Hide the scrollbar on the lobby graph

Author: ornicar

ui/lobby/css/app/_hook-chart.scss

@@ -2,6 +2,7 @@
   @extend %abs-100;
   bottom: 0;
   right: 0;
+  overflow: hidden;
   .label {
     color: $c-font-dim;
     font-size: .7em;