doc/go1.21: remove TODOs for x/ repos

Remove x/ repos changes that aren't part of the 1.21 release.

Change-Id: Ia5cbf02ed6c0cc4dc0ff80d68403723b3f9ae0ba
Reviewed-on: https://go-review.googlesource.com/c/go/+/498596
Run-TryBot: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Alan Donovan <adonovan@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
diff --git a/doc/go1.21.html b/doc/go1.21.html
index a610626..21d2b35e 100644
--- a/doc/go1.21.html
+++ b/doc/go1.21.html
@@ -806,26 +806,8 @@
   </dd>
 </dl><!-- testing/slogtest -->
 
-<dl id="x/sys/windows"><dt><a href="/pkg/x/sys/windows/">x/sys/windows</a></dt>
-  <dd>
-    <p><!-- https://go.dev/issue/54232 -->
-      TODO: <a href="https://go.dev/issue/54232">https://go.dev/issue/54232</a>: Add WSALookupService
-    </p>
-  </dd>
-</dl><!-- x/sys/windows -->
-
-<dl id="x/tools/go/analysis"><dt><a href="/pkg/x/tools/go/analysis/">x/tools/go/analysis</a></dt>
-  <dd>
-    <p><!-- https://go.dev/issue/57906 -->
-      TODO: <a href="https://go.dev/issue/57906">https://go.dev/issue/57906</a>: add Analyzer.URL and Diagnostic.URL fields
-    </p>
-  </dd>
-</dl><!-- x/tools/go/analysis -->
-
-<dl id="x/tools/go/types/objectpath"><dt><a href="/pkg/x/tools/go/types/objectpath/">x/tools/go/types/objectpath</a></dt>
-  <dd>
-    <p><!-- https://go.dev/issue/58668 -->
-      TODO: <a href="https://go.dev/issue/58668">https://go.dev/issue/58668</a>: add Encoder type, to amortize Scope.Names
-    </p>
-  </dd>
-</dl><!-- x/tools/go/types/objectpath -->
+<!-- proposals for x repos that don't need to be mentioned here but
+     are picked up by the relnote tool. -->
+<!-- https://go.dev/issue/54232 -->
+<!-- https://go.dev/issue/57906 -->
+<!-- https://go.dev/issue/58668 -->