Remove SystemHealthMetric (fka RAILScore)

tracing/tracing/ui/analysis/single_user_expectation_sub_view.html

Index: tracing/tracing/ui/analysis/single_user_expectation_sub_view.html
diff --git a/tracing/tracing/ui/analysis/single_user_expectation_sub_view.html b/tracing/tracing/ui/analysis/single_user_expectation_sub_view.html
index 0fc0958eb6b1e5bed526e46914d4cb2fa24681af..c3998ff49d039d3fce8a915cb02f9d263cc29ef2 100644
--- a/tracing/tracing/ui/analysis/single_user_expectation_sub_view.html
+++ b/tracing/tracing/ui/analysis/single_user_expectation_sub_view.html
@@ -5,7 +5,6 @@ Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file.
 -->
 
-<link rel="import" href="/tracing/metrics/system_health/system_health_metric.html">
 <link rel="import" href="/tracing/ui/analysis/analysis_sub_view.html">
 <link rel="import" href="/tracing/ui/analysis/single_event_sub_view.html">
 <link rel="import" href="/tracing/value/ui/time_duration_span.html">
@@ -50,7 +49,6 @@ found in the LICENSE file.
       var ir = this.selection[0];
 
       var metrics = [
-        {name: 'System Health', metric: SystemHealthMetric},
         {name: 'Responsiveness', metric: ResponsivenessMetric},
         {name: 'Efficiency', metric: EfficiencyMetric}];