remove unimplement rate-limit option [RT #46030]

diff --git a/doc/arm/Bv9ARM-book.xml b/doc/arm/Bv9ARM-book.xml
index 20584849081ef7093a3242b5bf9c48e8109867f3..c65c0b89bf1b67b1dd35a97015d6513496dd2d05 100644 (file)
--- a/doc/arm/Bv9ARM-book.xml
+++ b/doc/arm/Bv9ARM-book.xml
@@ -10792,17 +10792,6 @@ example.com                 CNAME   rpz-tcp-only.
            but are counted to compute the query per second rate.
          </para>
 
-         <para>
-           The optional <command>domain</command> clause specifies
-           the namespace to which rate limits will apply.  It
-           is possible to use different rate limits for different names
-           by specifying multiple <command>rate-limit</command> blocks
-           with different <command>domain</command> clauses.
-           The <command>rate-limit</command> statement's
-           <command>domain</command> most closely matches the query
-           name will be the one applied to a given query.
-         </para>
-
          <para>
            Rate limiters for different name spaces maintain
            separate counters: If, for example, there is a