Delete TelemetryInfo, MergedTelemetryInfo diagnostics.

docs/metrics-results-ui.md

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      Use of this source code is governed by a BSD-style license that can be
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 # Metrics Results UI
 
 This document assumes familiarity with the concepts introduced in
 [how-to-write-metrics](/docs/how-to-write-metrics.md).
 
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 After the header row, there will be one row for each of the leaf Histograms in
 the Grouping Tree. For example, if you group only by Histogram name, then there
 will be as many value rows as there are distinct Histogram names in the
 displayed HistogramSet.
 
 The columns will contain
  * Histogram name and units
  * summary statistics as configured by the metrics that produced the Histograms
    (avg, stddev, min, max, etc.),
- * TelemetryInfo fields (benchmarkName, storyName, etc.).
+ * HistogramGrouping values.
 
 ![Download leaf Histograms as CSV.
 ](/docs/images/metrics-results-ui-download-csv.png)
 
 ### The Show All Checkbox
 
 By default, this checkbox is unchecked so that the table only displays
 Histograms that are source nodes in the metric graphical model.
 Check this checkbox in order to show all Histograms, including those that are
 not source nodes in the metric graphical model.
 
 ![Show All Histograms checkbox.
 ](/docs/images/metrics-results-ui-show-all.png)