network service: Remove obsolete kRendererSideResourceScheduler comment.

The comment referred to deprecated_has_html_body_ which was removed
in r567510.

Change-Id: I62b8c521b70ed1b9121256338a7db5714d84359c
Bug: 794073
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2444630
Commit-Queue: Matt Falkenhagen <falken@chromium.org>
Auto-Submit: Matt Falkenhagen <falken@chromium.org>
Reviewed-by: Yutaka Hirano <yhirano@chromium.org>
Cr-Commit-Position: refs/heads/master@{#813066}

services/network/resource_scheduler/resource_scheduler.cc

@@ -1270,10 +1270,6 @@ class ResourceScheduler::Client
         ideal_duration_to_wait);
   }
 
-  // Tracks if the main HTML parser has reached the body which marks the end of
-  // layout-blocking resources.
-  // This is disabled and the is always true when kRendererSideResourceScheduler
-  // is enabled.
   RequestQueue pending_requests_;
   RequestSet in_flight_requests_;