RFR: 8276042: Remove unused local variables in java.naming

[Andrey Turbanov]

8276042: Remove unused local variables in java.naming

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Commit messages:
 - [PATCH] Remove unused local variable in java.naming

Changes: https://git.openjdk.java.net/jdk/pull/6091/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6091&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8276042
  Stats: 10 lines in 5 files changed: 0 ins; 5 del; 5 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6091.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6091/head:pull/6091

PR: https://git.openjdk.java.net/jdk/pull/6091