Remove dated check for jre sub-dir in JDK

Since Java 9, a JDK installation no longer necessarily has a jre sub-dir, see
<https://docs.oracle.com/javase/9/install/
installed-directory-structure-jdk-and-jre.htm> vs.
<https://docs.oracle.com/javase/8/docs/technotes/tools/windows/jdkfiles.html>.

The check for a jre sub-dir had been there ever since
157d22babb277a9e7bc750a74737cd60e84dfee8 "INTEGRATION: CWS rodarvus01", but the
code that determines a working JAVA_HOME has been improved a lot since then.
Given that the current check can be misleading (see
<https://lists.freedesktop.org/archives/libreoffice/2019-December/084005.html>
"Re: what jdk for build?"), better remove it completely and hope that the code
determining a working JAVA_HOME is good enough by now.

Change-Id: Ib1da3c00b8a3f1e54d5204e6ecd43b4c4441c827
Reviewed-on: https://gerrit.libreoffice.org/85257
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

0 files changed, 0 insertions, 0 deletions