Update whats-new.txt

Author: rustagir

source/references/whats-new.txt

@@ -140,12 +140,6 @@ and features:
 
       :ref:`java-atlas-vector-search` in the Aggregates Builders guide
 
-   .. replacement:: csot-link
-
-      the `MongoClientSettings.Builder.timeout()
-      <{+core-api+}/com/mongodb/MongoClientSettings.Builder.html#timeout(long,java.util.concurrent.TimeUnit)>`__
-      API documentation
-
 .. _java-version-5.1.3:
 
 What's New in 5.1.3