DevTools: Move frame rate overview timeline out of experiment.

Source/devtools/front_end/main/Main.js

Index: Source/devtools/front_end/main/Main.js
diff --git a/Source/devtools/front_end/main/Main.js b/Source/devtools/front_end/main/Main.js
index 141bfb5edbc8a3d1962681734375eef270a139d7..348390d3191b955515eb5d70b4475c091f1ffbdf 100644
--- a/Source/devtools/front_end/main/Main.js
+++ b/Source/devtools/front_end/main/Main.js
@@ -130,7 +130,6 @@ WebInspector.Main.prototype = {
         Runtime.experiments.register("emptySourceMapAutoStepping", "Empty sourcemap auto-stepping");
         Runtime.experiments.register("fileSystemInspection", "FileSystem inspection");
         Runtime.experiments.register("filmStripInNetworkAndTimeline", "Filmstrip in Network and Timeline Panel", true);
-        Runtime.experiments.register("frameRateOnEventsOverview", "Frame rate on Timeline events overview", true);
         Runtime.experiments.register("gpuTimeline", "GPU data on timeline", true);
         Runtime.experiments.register("inputEventsOnTimelineOverview", "Input events on Timeline overview", true)
         Runtime.experiments.register("layersPanel", "Layers panel");