RFR: JDK-8280019: Remove unused code from metaspace [v2]

[Thomas Stuefe]

> Sonarcloud-inspired code grooming. Trivial removal of unused code in metaspace.

Thomas Stuefe has updated the pull request incrementally with one additional commit since the last revision:

  fix copyrights

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7085/files
  - new: https://git.openjdk.java.net/jdk/pull/7085/files/a69dd0eb..584d6f86

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7085&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7085&range=00-01

  Stats: 14 lines in 7 files changed: 0 ins; 0 del; 14 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7085.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7085/head:pull/7085

PR: https://git.openjdk.java.net/jdk/pull/7085