Remove www.thewildernessdowntown.com from canvas telemetry tests

tools/perf/page_sets/data/tough_canvas_cases.json

 {
     "description": "Describes the Web Page Replay archives for a page set. Don't edit by hand! Use record_wpr for updating.", 
     "archives": {
         "tough_canvas_cases_001.wpr": [
             "http://mudcu.be/labs/JS1k/BreathingGalaxies.html", 
             "http://runway.countlessprojects.com/prototype/performance_test.html", 
             "http://geoapis.appspot.com/agdnZW9hcGlzchMLEgtFeGFtcGxlQ29kZRjh1wIM", 
             "http://ie.microsoft.com/testdrive/Graphics/HowStuffWorksGears/Default.html", 
             "http://ie.microsoft.com/testdrive/Performance/FishIETank/Default.html", 
             "http://ie.microsoft.com/testdrive/Performance/SpeedReading/Default.html", 
             "http://acko.net/dumpx/996b.html", 
             "http://www.kevs3d.co.uk/dev/canvask3d/k3d_test.html", 
             "http://www.megidish.net/awjs/", 
             "http://ie.microsoft.com/testdrive/Performance/Fireflies/Default.html", 
             "http://themaninblue.com/experiment/AnimationBenchmark/canvas/", 
             "http://mix10k.visitmix.com/Entry/Details/169", 
             "http://www.craftymind.com/factory/guimark2/HTML5ChartingTest.html", 
             "http://www.chiptune.com/starfield/starfield.html", 
             "http://jarrodoverson.com/static/demos/particleSystem/", 
             "http://www.effectgames.com/demos/canvascycle/", 
-            "http://www.thewildernessdowntown.com/", 
             "http://spielzeugz.de/html5/liquid-particles.html", 
             "http://hakim.se/experiments/html5/magnetic/02/", 
             "http://ie.microsoft.com/testdrive/Performance/LetItSnow/", 
             "http://ie.microsoft.com/testdrive/Graphics/WorkerFountains/Default.html", 
             "http://ie.microsoft.com/testdrive/Graphics/TweetMap/Default.html", 
             "http://ie.microsoft.com/testdrive/Graphics/VideoCity/Default.html", 
             "http://ie.microsoft.com/testdrive/Performance/AsteroidBelt/Default.html", 
             "http://www.smashcat.org/av/canvas_test/"
         ]
     }
 }