weighted tree: Remove unused formatter

Change-Id: I7fcfcb488eabbdeb70a65f8b86712d086b9c2dd0
Signed-off-by: Geneviève Bastien <gbastien+lttng@versatic.net>
Reviewed-on: https://git.eclipse.org/r/149386
Tested-by: CI Bot
Reviewed-by: Matthew Khouzam <matthew.khouzam@ericsson.com>
diff --git a/callstack/org.eclipse.tracecompass.incubator.callstack.ui/src/org/eclipse/tracecompass/incubator/internal/callstack/ui/views/weightedtree/WeightedTreeView.java b/callstack/org.eclipse.tracecompass.incubator.callstack.ui/src/org/eclipse/tracecompass/incubator/internal/callstack/ui/views/weightedtree/WeightedTreeView.java
index 3bf9492..0fa5011 100644
--- a/callstack/org.eclipse.tracecompass.incubator.callstack.ui/src/org/eclipse/tracecompass/incubator/internal/callstack/ui/views/weightedtree/WeightedTreeView.java
+++ b/callstack/org.eclipse.tracecompass.incubator.callstack.ui/src/org/eclipse/tracecompass/incubator/internal/callstack/ui/views/weightedtree/WeightedTreeView.java
@@ -8,8 +8,6 @@
  *******************************************************************************/
 package org.eclipse.tracecompass.incubator.internal.callstack.ui.views.weightedtree;
 
-import java.text.DecimalFormat;
-import java.text.Format;
 import java.util.Collections;
 import java.util.HashSet;
 import java.util.Set;
@@ -37,8 +35,6 @@
  */
 public class WeightedTreeView extends TmfView {
 
-    static final Format DECIMAL_FORMATTER = new DecimalFormat("###,###.##"); //$NON-NLS-1$
-
     /**
      * The ID of this view
      */