diff --git a/thirdparty/itt_collector/runtool/exporters/Stat.py b/thirdparty/itt_collector/runtool/exporters/Stat.py
index 4d3a6cc3ac8..67007e9169d 100644
--- a/thirdparty/itt_collector/runtool/exporters/Stat.py
+++ b/thirdparty/itt_collector/runtool/exporters/Stat.py
@@ -18,21 +18,16 @@ import csv
 import shutil
 from sea_runtool import GraphCombiner
 
-# Supported values are "csv" and "tsv"
-FILE_EXTENSION = ".csv"
-
 class Stat(GraphCombiner):
     def __init__(self, args, tree):
         GraphCombiner.__init__(self, args, tree)
 
     def get_targets(self):
-        return [self.args.output + FILE_EXTENSION]
+        return [self.args.output + ".csv"]
 
     def finish(self):
         GraphCombiner.finish(self)
         delim = ','
-        if FILE_EXTENSION == ".tsv":
-            delim = '\t'
         with open(self.get_targets()[-1], 'w') as f:
             writer = csv.writer(f, delimiter=delim)
             writer.writerow(["domain", "name", "min", "max", "avg", "total", "count"])
@@ -41,15 +36,6 @@ class Stat(GraphCombiner):
                     time = task_data['time']
                     writer.writerow([domain, task_name, min(time), max(time), sum(time) / len(time), sum(time), len(time)])
 
-    @staticmethod
-    def join_traces(traces, output, args):  # FIXME: implement real joiner
-        sorting = []
-        for trace in traces:
-            sorting.append((os.path.getsize(trace), trace))
-        sorting.sort(key=lambda size_trace: size_trace[0], reverse=True)
-        shutil.copyfile(sorting[0][1], output + ".tsv")
-        return output + ".tsv"
-
 EXPORTER_DESCRIPTORS = [{
     'format': 'stat',
     'available': True,