RFR: 8277413: Remove unused local variables in jdk.hotspot.agent

[Andrey Turbanov]

8277413: Remove unused local variables in jdk.hotspot.agent

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Commit messages:
 - [PATCH] Remove unused local variables in jdk.hotspot.agent

Changes: https://git.openjdk.java.net/jdk/pull/6329/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6329&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8277413
  Stats: 26 lines in 8 files changed: 0 ins; 14 del; 12 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6329.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6329/head:pull/6329

PR: https://git.openjdk.java.net/jdk/pull/6329