DevTools: Remove unused frontend code

Source/devtools/front_end/timeline/TimelineFrameModel.js

Index: Source/devtools/front_end/timeline/TimelineFrameModel.js
diff --git a/Source/devtools/front_end/timeline/TimelineFrameModel.js b/Source/devtools/front_end/timeline/TimelineFrameModel.js
index d546fc3b51d461e26cdd1f72090df46f5a46bf95..bda7a28acbea734fdf261cf2ed221744322ae127 100644
--- a/Source/devtools/front_end/timeline/TimelineFrameModel.js
+++ b/Source/devtools/front_end/timeline/TimelineFrameModel.js
@@ -380,45 +380,6 @@ WebInspector.DeferredTracingLayerTree.prototype = {
 
 /**
  * @constructor
- * @param {!Array.<!WebInspector.TimelineFrame>} frames
- */
-WebInspector.FrameStatistics = function(frames)
-{
-    this.frameCount = frames.length;
-    this.minDuration = Infinity;
-    this.maxDuration = 0;
-    this.timeByCategory = {};
-    this.startOffset = frames[0].startTimeOffset;
-    var lastFrame = frames[this.frameCount - 1];
-    this.endOffset = lastFrame.startTimeOffset + lastFrame.duration;
-
-    var totalDuration = 0;
-    var sumOfSquares = 0;
-    for (var i = 0; i < this.frameCount; ++i) {
-        var duration = frames[i].duration;
-        totalDuration += duration;
-        sumOfSquares += duration * duration;
-        this.minDuration = Math.min(this.minDuration, duration);
-        this.maxDuration = Math.max(this.maxDuration, duration);
-        WebInspector.FrameStatistics._aggregateTimeByCategory(this.timeByCategory, frames[i].timeByCategory);
-    }
-    this.average = totalDuration / this.frameCount;
-    var variance = sumOfSquares / this.frameCount - this.average * this.average;
-    this.stddev = Math.sqrt(variance);
-}
-
-/**
- * @param {!Object} total
- * @param {!Object} addend
- */
-WebInspector.FrameStatistics._aggregateTimeByCategory = function(total, addend)
-{
-    for (var category in addend)
-        total[category] = (total[category] || 0) + addend[category];
-}
-
-/**
- * @constructor
  * @param {number} startTime
  * @param {number} startTimeOffset
  */