RFR: 8256323: Remove HeapRegionManager::update_committed_space()

[Thomas Schatzl]

Hi all,

  can I have reviews for this trivial removal of the unimplemented function declaration of HeapRegionManager::update_committed_space()?

Testing: local compilation

Thanks,
  Thomas

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

Commit messages:
 - Initial commit

Changes: https://git.openjdk.java.net/jdk/pull/1219/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1219&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8256323
  Stats: 3 lines in 1 file changed: 0 ins; 3 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1219.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1219/head:pull/1219

PR: https://git.openjdk.java.net/jdk/pull/1219