RFR: JDK-8293178: Remove obsolete properties from javadoc resource file

[Jonathan Gibbons]

Please review a trivial update to remove some obsolete properties from a javadoc resource file.

-------------

Commit messages:
 - JDK-8293178: Remove obsolete properties from javadoc resource file

Changes: https://git.openjdk.org/jdk/pull/10105/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10105&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8293178
  Stats: 10 lines in 2 files changed: 0 ins; 6 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/10105.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10105/head:pull/10105

PR: https://git.openjdk.org/jdk/pull/10105