remove useless code

app/src/main/java/net/pokeranalytics/android/ui/fragment/GraphFragment.kt

@@ -176,15 +176,7 @@ class GraphFragment : PokerAnalyticsFragment(), OnChartValueSelectedListener {
 
 	override fun onValueSelected(e: Entry?, h: Highlight?) {
 
-		var groupName = ""
-		h?.let { highlight ->
-			this.chartView?.data?.getDataSetByIndex(highlight.dataSetIndex)?.let {
-				groupName = it.label
-			}
-		}
-
 		val dataSet = this.chartView?.data?.getDataSetForEntry(e)
-
 		e?.let { entry ->
 			this.selectValue(entry, dataSet)
 		}