RFR: 8344799: Remove permissions checks from java.awt.Desktop

[Phil Race]

Clean up permission checks in java.awt.Desktop class
Also remove no longer needed exports from java.base to java.desktop

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Commit messages:
 - 8344799

Changes: https://git.openjdk.org/jdk/pull/22311/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22311&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8344799
  Stats: 83 lines in 2 files changed: 0 ins; 83 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/22311.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22311/head:pull/22311

PR: https://git.openjdk.org/jdk/pull/22311