RFR: 8286291: G1: Remove unused segment allocator printouts

[Thomas Schatzl]

Hi all,

  please review this (trivial) removal of some unused debug code.

Testing: gha, local compilation

Thanks,
  Thomas

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Commit messages:
 - Remove print() method
 - initail implementation, waiting for dependent issues

Changes: https://git.openjdk.java.net/jdk/pull/8574/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8574&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8286291
  Stats: 39 lines in 4 files changed: 0 ins; 38 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8574.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8574/head:pull/8574

PR: https://git.openjdk.java.net/jdk/pull/8574