Trace analyzer - Number of Columns

Only one column is used in the trace analyzer metric section. The code
was setting it to 2. However, only one column is needed and it is enough
to specify it in the form.

DRAMSys/analyzer/presentation/tracemetrictreewidget.cpp

@@ -46,8 +46,6 @@ TraceMetricTreeWidget::TraceMetricTreeWidget(QWidget *parent) : QTreeWidget(pare
 
 void TraceMetricTreeWidget::addTraceMetricResults(const TraceCalculatedMetrics& result)
 {
-    setColumnCount(2);
-
     QTreeWidgetItem* top = new QTreeWidgetItem({result.getTraceName()});
     addTopLevelItem(top);
 
@@ -66,8 +64,6 @@ void TraceMetricTreeWidget::addTraceMetricResults(const TraceCalculatedMetrics&
 
 void TraceMetricTreeWidget::addTracePlotResults(QString traceName, QString outputFiles)
 {
-    setColumnCount(2);
-
     QTreeWidgetItem* top = new QTreeWidgetItem({traceName});
     addTopLevelItem(top);