RFR: 8326763: Consolidate print methods in ContiguousSpace

[Albert Mingkun Yang]

Trivial inlining and removing some unused methods.

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Commit messages:
 - review
 - review
 - trivial

Changes: https://git.openjdk.org/jdk/pull/18022/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18022&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8326763
  Stats: 14 lines in 2 files changed: 0 ins; 10 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/18022.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18022/head:pull/18022

PR: https://git.openjdk.org/jdk/pull/18022