RFR: 8269678: Remove unimplemented and unused os::bind_to_processor()

[Zhengyu Gu]

Please review this trivial patch that removes unimplemented and unused method, appears to be a leftover from Solaris port.

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Commit messages:
 - v1

Changes: https://git.openjdk.java.net/jdk/pull/4640/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=4640&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8269678
  Stats: 24 lines in 5 files changed: 0 ins; 24 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4640.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4640/head:pull/4640

PR: https://git.openjdk.java.net/jdk/pull/4640