RFR: 8319985: Delete sun.awt.windows.WToolkit.embedded*() API

[Sergey Bylokhov]

Unused "embedded.." methods in the "sun.awt.windows.WToolkit" class were deleted.

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Commit messages:
 - Update awt_Toolkit.cpp
 - Merge remote-tracking branch 'upstream/master' into emb
 - Delete sun.awt.windows.WToolkit.embedded*() API

Changes: https://git.openjdk.org/jdk/pull/16640/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16640&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8319985
  Stats: 149 lines in 3 files changed: 0 ins; 143 del; 6 mod
  Patch: https://git.openjdk.org/jdk/pull/16640.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16640/head:pull/16640

PR: https://git.openjdk.org/jdk/pull/16640