RFR: 8326000: Remove obsolete comments for class sun.security.ssl.SunJSSE [v2]

[Christoph Langer]

> The experimental SunJSSE FIPS compliant mode was removed in JDK13 with [JDK-8217835](https://bugs.openjdk.org/browse/JDK-8217835).
> It seems the removal of some comments had been missed at that time. This could be irritating to readers of the code.

Christoph Langer has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:

 - Update copyright
 - Merge branch 'master' into JDK-8326000
 - JDK-8326000

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/17885/files
  - new: https://git.openjdk.org/jdk/pull/17885/files/ae7b7388..7ba4c017

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=17885&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17885&range=00-01

  Stats: 787 lines in 21 files changed: 611 ins; 94 del; 82 mod
  Patch: https://git.openjdk.org/jdk/pull/17885.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17885/head:pull/17885

PR: https://git.openjdk.org/jdk/pull/17885