[lworld] RFR: 8294797: [lworld] update javadoc to remove references to primitive classes [v2]

[Mandy Chung]

> This reverts the javadoc changes for primitive classes and a couple leftover changes due to the previous design that is no longer applicable.

Mandy Chung has refreshed the contents of this pull request, and previous commits have been removed. Incremental views are not available.

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Changes:
  - all: https://git.openjdk.org/valhalla/pull/774/files
  - new: https://git.openjdk.org/valhalla/pull/774/files/7c2794d4..ee15e2d9

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=valhalla&pr=774&range=01
 - incr: https://webrevs.openjdk.org/?repo=valhalla&pr=774&range=00-01

  Stats: 81 lines in 13 files changed: 38 ins; 13 del; 30 mod
  Patch: https://git.openjdk.org/valhalla/pull/774.diff
  Fetch: git fetch https://git.openjdk.org/valhalla pull/774/head:pull/774

PR: https://git.openjdk.org/valhalla/pull/774