Re-enable rendering.desktop/balls_svg_animations

After d663ac73, this test should no
longer be timing out. Re-enable for desktop platforms first.

Bug: 1000473
Change-Id: I7de6f9912254e02c7cc5f1795666d93b7da690d8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1886615
Commit-Queue: Fredrik Söderquist <fs@opera.com>
Reviewed-by: Caleb Rouleau <crouleau@chromium.org>
Cr-Commit-Position: refs/heads/master@{#716162}

tools/perf/expectations.config

@@ -220,9 +220,6 @@ crbug.com/919191 [ android-nexus-5x android-webview ] loading.mobile/OLX_3g [ Sk
 # Benchmark: rendering.desktop
 crbug.com/755556 [ mac ] rendering.desktop/mix_blend_mode_animation_difference [ Skip ]
 crbug.com/755556 [ mac ] rendering.desktop/mix_blend_mode_animation_hue [ Skip ]
-crbug.com/1000473 [ linux ] rendering.desktop/balls_svg_animations [ Skip ]
-crbug.com/1000473 [ mac ] rendering.desktop/balls_svg_animations [ Skip ]
-crbug.com/1000473 [ win ] rendering.desktop/balls_svg_animations [ Skip ]
 crbug.com/1017244 [ desktop ] rendering.desktop/youtube_2018 [ Skip ]
 crbug.com/1017244 [ desktop ] rendering.desktop/youtube_pinch_2018 [ Skip ]