Mark platform_views_hcpp_scroll_perf__timeline_summary out of bringup (#163883)

platform_views_hcpp_scroll_perf__timeline_summary is happily passing


https://ci.chromium.org/ui/p/flutter/builders/staging/Linux_pixel_7pro%20platform_views_hcpp_scroll_perf__timeline_summary/255/overview

Introduced in flutter/flutter#163018.

Author: jmagman

.ci.yaml

@@ -3224,7 +3224,6 @@ targets:
   - name: Linux_pixel_7pro platform_views_hcpp_scroll_perf__timeline_summary
     recipe: devicelab/devicelab_drone
     presubmit: false
-    bringup: true
     timeout: 60
     properties:
       tags: >