undit the margin fix to scatter chart only

gist-charts/source/implementations/charts/scatterChartImplementation.class.ts

@@ -53,8 +53,6 @@ export class ScatterChartImplementation extends BaseChartImplementation {
 
     public getDataAtCoord( px: number, py: number, closeEnough: number ): DataPoint[] {
         let activePoints: Array<Point> = [];
-        px += this.chart.margin;
-        py += this.chart.margin;
         let xi = px - closeEnough, xo = px + closeEnough, yi = py - closeEnough, yo = py + closeEnough;
         this.quadTree.visit(( node: any, x0, y0, x1, y1 ) => {
             if ( !node.length ) {