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

[dmitry.markov at oracle.com]

Changeset: ea0313ba4705
Author:    dmarkov
Date:      2018-10-04 10:10 +0100
URL:       http://hg.openjdk.java.net/jdk8u/jdk8u-dev/corba/rev/ea0313ba4705

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

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