RFR: 8344256: Clean up obsolete code in java.desktop/share/classes/sun/awt/datatransfer/DataTransferer.java [v2]

[Phil Race]

> Clean up obsolete code in DataTransferer.java
> The main aim here was to get rid of ProtectionDomain and other SM related usage.

Phil Race has updated the pull request incrementally with one additional commit since the last revision:

  8344256

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Changes:
  - all: https://git.openjdk.org/jdk/pull/22381/files
  - new: https://git.openjdk.org/jdk/pull/22381/files/37072de3..480f1c16

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=22381&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22381&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/22381.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22381/head:pull/22381

PR: https://git.openjdk.org/jdk/pull/22381