RFR: 8345001: java/awt/doc-files/FocusSpec.html has SecurityManager references

[Phil Race]

Remove references to SecurityManager related functionality from the AWT Focus Specification

non-goal : generally updating the Focus Spec ..

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Commit messages:
 - 8345001

Changes: https://git.openjdk.org/jdk/pull/22377/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22377&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8345001
  Stats: 22 lines in 1 file changed: 0 ins; 22 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/22377.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22377/head:pull/22377

PR: https://git.openjdk.org/jdk/pull/22377