RFR: 8316998: Remove redundant type arguments [v2]

[Mourad Abbay]

> Remove cases of redundant type arguments in the java.util.stream package.

Mourad Abbay has updated the pull request incrementally with one additional commit since the last revision:

  Remove redundant type arguments.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/15936/files
  - new: https://git.openjdk.org/jdk/pull/15936/files/f984e52f..1107c222

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15936&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15936&range=00-01

  Stats: 170 lines in 7 files changed: 22 ins; 11 del; 137 mod
  Patch: https://git.openjdk.org/jdk/pull/15936.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15936/head:pull/15936

PR: https://git.openjdk.org/jdk/pull/15936