git: openjdk/jdk: 8297385: Remove duplicated null typos in javadoc

[Yi Yang]

Changeset: 0ed8b337
Author:    Dongxu Wang <dongxu at apache.org>
Committer: Yi Yang <yyang at openjdk.org>
Date:      2022-11-25 05:55:19 +0000
URL:       https://git.openjdk.org/jdk/commit/0ed8b337eaa59881a62af5dcc0abb454761f2e71

8297385: Remove duplicated null typos in javadoc

Reviewed-by: dfuchs, rriggs

! src/java.xml/share/classes/javax/xml/parsers/DocumentBuilder.java