Removes `SecurityManager` and friends from `jdk.httpserver`. Will share
`tier1..2` results soon.
**Methodology:** Case-insensitively and recursively searched for the
occurrences of `("removal"|secu|privi)` in `httpserver`-named folders.
-------------
Commit messages:
- Remove `SecurityManager` and friends from `jdk.httpserver`
Changes: https://git.openjdk.org/jdk/pull/22510/files
Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22510&range=00
Issue: https://bugs.openjdk.org/browse/JDK-8344229
Stats: 312 lines in 29 files changed: 0 ins; 181 del; 131 mod
Patch: https://git.openjdk.org/jdk/pull/22510.diff
Fetch: git fetch https://git.openjdk.org/jdk.git pull/22510/head:pull/22510
PR: https://git.openjdk.org/jdk/pull/22510
