RFR: 8268224: Cleanup references to "strictfp" in core lib comments [v2]

[Joe Darcy]

> With the right baseline this time, as noticed by John Rose, after JEP 306 removing non-strict floating-point was integrated, a few stale references were left to "strictfp" and "value sets" in core library comments. This changeset removes those stray references.

Joe Darcy has updated the pull request incrementally with one additional commit since the last revision:

  Reflow paragraphs.

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/4349/files
  - new: https://git.openjdk.java.net/jdk/pull/4349/files/7ab8f9f2..596971e0

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=4349&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=4349&range=00-01

  Stats: 50 lines in 2 files changed: 0 ins; 5 del; 45 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4349.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4349/head:pull/4349

PR: https://git.openjdk.java.net/jdk/pull/4349