Delete TelemetryInfo, MergedTelemetryInfo diagnostics.

docs/histogram-set-json-format.md

 <!-- Copyright 2016 The Chromium Authors. All rights reserved.
      Use of this source code is governed by a BSD-style license that can be
      found in the LICENSE file.
 -->
 
 # HistogramSet JSON Format
 
 This document assumes familiarity with the concepts introduced in
 [how-to-write-metrics](/docs/how-to-write-metrics.md).
 
 HistogramSet JSON contains an unordered array of dictionaries, where each
 dictionary represents either a Histogram or a Diagnostic.
 
 ```javascript
 [
   {
     "name": "my amazing metric",
     "guid": "123e4567-e89b-12d3-a456-426655440000",
     "unit": "ms",
     "binBoundaries": [0, [0, 100, 10]],
     "shortName": "my metric",
     "description": "this is my awesome amazing metric",
     "diagnostics": {
-      "telemetry": "923e4567-e89b-12d3-a456-426655440000",
+      "stories": "923e4567-e89b-12d3-a456-426655440000",
     },
     "sampleValues": [0, 1, 42, -999999999.99999, null],
     "maxNumSampleValues": 1000,
     "numNans": 1,
     "nanDiagnostics": [
       {
         "events": {
           "type": "RelatedEventSet",
           "events": [
             {
               "stableId": "a.b.c", "title": "Title", "start": 0, "duration": 1
             }
           ]
         }
       }
     ],
     "running": [5, 42, 0, -1, -999, -900, 100],
     "allBins": {
       "0": [1],
       "1": [1],
     },
     "summaryOptions": {
       "nans": true,
       "percentile": [0.5, 0.95, 0.99],
     },
   },
   {
     "guid": "923e4567-e89b-12d3-a456-426655440000",
-    "type": "TelemetryInfo",
-    "benchmarkName": "memory",
-    "benchmarkStartMs": 1234567890,
-    "label": "abc",
-    "storyDisplayName": "my story",
-    "storyGroupingKeys": {"state": "pre"},
-    "storysetRepeatCounter": 0,
+    "type": "GenericSet",
+    "values": ["browse:news:cnn"],
   },
 ]
 ```
 
 ## Histograms
 
 ### Required fields
 
  * `name`: any string
  * `guid`: string UUID, allows Histograms to reference other Histograms via
@@ skipping 54 matching lines @@
 DiagnosticMap is a dictionary mapping strings to Diagnostic dictionaries.
 
 ## Diagnostics
 
 The only field that is required for all Diagnostics, `type`, must be one of
  * `GenericSet`
  * `RelatedEventSet`
  * `Breakdown`
  * `RelatedHistogramMap`
  * `RelatedHistogramBreakdown`
- * `TelemetryInfo`
  * `Scalar`
 
 If a Diagnostic is in the root array of the JSON, then it is shared, so it may be
 referenced by multiple Histograms. Shared Diagnostics must contain a string
 field `guid` containing a UUID.
 
 If a Diagnostic is contained in a Histogram, then it must not have a `guid`
 field.
 
 The other fields of Diagnostic dictionaries depend on `type`.
 
-### TelemetryInfo
-
-This tracks telemetry parameters when the Histogram was produced to allow users
-to compare or merge results across similar telemetry story runs.
-
- * `benchmarkName`: string
- * `benchmarkStartMs`: number of ms since unix epoch
- * `label`: string
- * `legacyTIRLabel`: string
- * `storyDisplayName`: string
- * `storyGroupingKeys`: dictionary mapping from strings to strings
- * `storysetRepeatCounter`: number
-
 ### GenericSet
 
 This allows metrics to store arbitrary untyped data in Histograms.
 
  * `values`: array of any JSON data.
 
 ### Scalar
 
 Metrics should not use Scalar diagnostics since they cannot be safely merged.
 
@@ skipping 31 matching lines @@
 
  * `events`: array of dictionaries containing `stableId`, `title`, `start`,
    `duration` fields of Events
 
 ### DateRange
 
 This is a Range of Dates.
 
  * `min`: Unix timestamp in ms
  * `max`: optional Unix timestamp in ms