RFR: 8225235: Unused field defaultIndex in NetworkInterface [v2]

[Viktor Klang (Oracle)]

> Removes the `defaultIndex`since it is no longer used.

Viktor Klang (Oracle) has updated the pull request incrementally with one additional commit since the last revision:

  Updating copyright year in NetworkInterface.java to 2022

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Changes:
  - all: https://git.openjdk.org/jdk/pull/10471/files
  - new: https://git.openjdk.org/jdk/pull/10471/files/3a9fe9ac..3e7a253b

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10471&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10471&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/10471.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10471/head:pull/10471

PR: https://git.openjdk.org/jdk/pull/10471