feat(styles): remove overflow-y from reset

closes #1197

Author: KaelWD

packages/vuetify/src/styles/generic/_reset.scss

@@ -15,7 +15,6 @@
 
     html {
       box-sizing: border-box;
-      overflow-y: scroll; /* All browsers without overlaying scrollbars */
       -webkit-text-size-adjust: 100%; /* Prevent adjustments of font size after orientation changes in iOS */
       word-break: normal;
       -moz-tab-size: 4;