Don't set 'hovered.event' automatically since we do it within the charts that...

Don't set 'hovered.event' automatically since we do it within the charts that want the tooltip to follow the mouse now. Resolves #2145

frontend/src/visualizations/components/Visualization.jsx

@@ -4,7 +4,6 @@ import visualizations from "metabase/visualizations";
 
 import i from "icepick";
 import _ from "underscore";
-import d3 from "d3";
 
 export default class Visualization extends Component {
     constructor(props, context) {
@@ -63,9 +62,6 @@ export default class Visualization extends Component {
     onHoverChange(hovered) {
         const { renderInfo } = this.state;
         if (hovered) {
-            if (!hovered.event) {
-                hovered = i.assoc(hovered, "event", d3.event);
-            }
             // if we have Y axis split info then find the Y axis index (0 = left, 1 = right)
             if (renderInfo && renderInfo.yAxisSplit) {
                 const axisIndex = _.findIndex(renderInfo.yAxisSplit, (indexes) => _.contains(indexes, hovered.index));