RFR: 8289: Remove security manager related code [v2]

[Marcus Hirt]

> Also fixing a deprecation.

Marcus Hirt 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 five additional commits since the last revision:

 - Merge branch '8289-remove-security-manager' of https://github.com/thegreystone/jmc into 8289-remove-security-manager
 - Removing permission class
 - 8289: Removing security manager related code
 - Removing permission class
 - 8289: Removing security manager related code

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

Changes:
  - all: https://git.openjdk.org/jmc/pull/640/files
  - new: https://git.openjdk.org/jmc/pull/640/files/0d702097..05be8787

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jmc&pr=640&range=01
 - incr: https://webrevs.openjdk.org/?repo=jmc&pr=640&range=00-01

  Stats: 1265 lines in 51 files changed: 962 ins; 143 del; 160 mod
  Patch: https://git.openjdk.org/jmc/pull/640.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/640/head:pull/640

PR: https://git.openjdk.org/jmc/pull/640