Index Change: Remove misleading documentation

It has not been possible for change owners to index their own changes
for a while, but the documentation still claims that they can.

Bug: Issue 337070245
Release-Notes: Skip
Change-Id: I67a973da01b57c5cd779314132c7e586c92f6c9b
diff --git a/Documentation/cmd-index-changes.txt b/Documentation/cmd-index-changes.txt
index 0ee7aab..1d4cbe34 100644
--- a/Documentation/cmd-index-changes.txt
+++ b/Documentation/cmd-index-changes.txt
@@ -16,8 +16,7 @@
 supported by the REST API.
 
 == ACCESS
-Caller must have the 'Maintain Server' capability, or be the owner of the change
-to be indexed.
+Caller must have the 'Maintain Server' capability.
 
 == SCRIPTING
 This command is intended to be used in scripts.