Hide horizontal scrollbar.

frontend/src/app/components/start/start.component.scss

@@ -3,4 +3,9 @@
   overflow-x: scroll;
   overflow-y: hidden;
   scrollbar-width: none;
+  -ms-overflow-style: none;
+}
+
+#blockchain-container::-webkit-scrollbar {
+    display: none;
 }