RFR: 8344331: SM cleanup in java.scripting [v2]

[Justin Lu]

> Please review this PR which removes the lone `AccessController.doPrivileged` call from the _java.scripting_ module after JEP486 integration.

Justin Lu has updated the pull request incrementally with one additional commit since the last revision:

  remove local var 'sl'

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Changes:
  - all: https://git.openjdk.org/jdk/pull/22170/files
  - new: https://git.openjdk.org/jdk/pull/22170/files/ca97d16b..abb39ab3

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=22170&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22170&range=00-01

  Stats: 2 lines in 1 file changed: 0 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/22170.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22170/head:pull/22170

PR: https://git.openjdk.org/jdk/pull/22170