RFR: 8276042: Remove unused local variables in java.naming [v2]

[Andrey Turbanov]

> 8276042: Remove unused local variables in java.naming

Andrey Turbanov has updated the pull request incrementally with one additional commit since the last revision:

  8276042: Remove unused local variables in java.naming
  use instanceof pattern

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6091/files
  - new: https://git.openjdk.java.net/jdk/pull/6091/files/58bfec0d..f697d88c

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6091&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6091&range=00-01

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 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