RFR: 8272618: Unnecessary Attr.visitIdent.noOuterThisPath

[Jan Lahoda]

This patch removes an unnecessary variable, which was not removed when `-source <= 5` was removed:
https://bugs.openjdk.java.net/browse/JDK-8011044

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Commit messages:
 - 8272618: Unnecessary Attr.visitIndent.noOuterThisPath

Changes: https://git.openjdk.java.net/jdk/pull/5163/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5163&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8272618
  Stats: 11 lines in 1 file changed: 0 ins; 8 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5163.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5163/head:pull/5163

PR: https://git.openjdk.java.net/jdk/pull/5163