RFR: 8289431: (zipfs) Avoid redundant HashMap.get in ZipFileSystemProvider.removeFileSystem [v2]

[Andrey Turbanov]

> There is overload method HashMap.remove(key,value) which also checks value equality.
> It's shorter and faster than pair get+remove.

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

  8289431: (zipfs) Avoid redundant HashMap.get in ZipFileSystemProvider.removeFileSystem
  update copyright year

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Changes:
  - all: https://git.openjdk.org/jdk/pull/9314/files
  - new: https://git.openjdk.org/jdk/pull/9314/files/5a83b10c..d9eeaebe

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=9314&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=9314&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/9314.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9314/head:pull/9314

PR: https://git.openjdk.org/jdk/pull/9314