hg: jdk8u/jdk8u-dev/jaxp: 8210891: Remove unused extutil.h from JDK8u sources

[dmitry.markov at oracle.com]

Changeset: 72f7719cbae6
Author:    dmarkov
Date:      2018-10-04 10:13 +0100
URL:       http://hg.openjdk.java.net/jdk8u/jdk8u-dev/jaxp/rev/72f7719cbae6

8210891: Remove unused extutil.h from JDK8u sources
Reviewed-by: prr

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