weblayer: update comment about removing code

As the client library is being take from trunk, we can't really change
this until 83 goes to stable.

BUG=1031830
TEST=none

Change-Id: Ib21b899b99882d15a5e1affa478cf721d145d232
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2135809
Auto-Submit: Scott Violet <sky@chromium.org>
Commit-Queue: Clark DuVall <cduvall@chromium.org>
Reviewed-by: Clark DuVall <cduvall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#756718}

weblayer/public/java/org/chromium/weblayer/WebLayer.java

@@ -281,7 +281,7 @@ public class WebLayer {
                         "org.chromium.weblayer_private.WebLayerFactoryImpl");
                 // NOTE: the 20 comes from the previous scheme of incrementing versioning. It must
                 // remain at 20 for Chrome version 79.
-                // TODO(https://crbug.com/1031830): change 20 to -1 when tip of tree is at 83.
+                // TODO(https://crbug.com/1031830): change 20 to -1 when 83 goes to stable.
                 mFactory = IWebLayerFactory.Stub.asInterface(
                         (IBinder) factoryClass
                                 .getMethod("create", String.class, int.class, int.class)