DeviceInfo into GenericSets

docs/how-to-write-metrics.md

Index: docs/how-to-write-metrics.md
diff --git a/docs/how-to-write-metrics.md b/docs/how-to-write-metrics.md
index a2487855fb5d0d7a9a24beaab088a132ce368297..d5a0e51d3187ad1f53c3f30917b9dc467862eb82 100644
--- a/docs/how-to-write-metrics.md
+++ b/docs/how-to-write-metrics.md
@@ -188,15 +188,6 @@ histogram.addSample(number, {name: diagnostic})
 
    ![](/docs/images/how-to-write-metrics-telemetry.png)
 
- * [DeviceInfo](/tracing/tracing/value/diagnostics/device_info.html):
-   This is automatically attached to every Histogram produced by buildbots.
-   Structurally, it's a class with explicit named fields. Conceptually, it
-   contains information about the machine that produced the trace that was
-   consumed by the metric that produced the Histogram, such as the OS version,
-   Chrome version, etc. Visually, DeviceInfos are displayed as a table.
-
-   ![](/docs/images/how-to-write-metrics-device.png)
-
  * [RevisionInfo](/tracing/tracing/value/diagnostics/revision_info.html):
    This is automatically attached to every Histogram produced by telemetry.
    Structurally, it's a class with explicit named fields. Conceptually, it