Remove some subcomponent descriptions for Network Bug Triage that are not relevant.

NOTRY=true

Change-Id: I083b5ee85f6906c40cdbd0d361b9d2aca06737fb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2247083
Commit-Queue: Eric Roman <eroman@chromium.org>
Reviewed-by: Zhongyi Shi <zhongyi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#778940}

net/docs/bug-triage-labels.md

@@ -10,22 +10,11 @@
     that die in the SSL negotiation phase, in particular, this is often the
     correct component.
 
-* **Internals>Network>DataProxy**
-
-    Flywheel / the Data Reduction Proxy.  Issues require "Reduce Data Usage" be
-    turned on.  Proxy URL is [https://proxy.googlezip.net:443](#), with
-    [http://compress.googlezip.net:80](#) as a fallback.  Currently Android and
-    iOS only.
-
 * **Internals>Network>Cache**
 
     The cache is the layer that handles most range request logic (Though range
     requests may also be issued by the PDF plugin, XHRs, or other components).
 
-* **Internals>Network>SPDY**
-
-    Covers HTTP2 as well.
-
 * **Internals>Network>HTTP**
 
     Typically not used.  Unclear what it covers, and there's no specific HTTP