[jdk11u-dev] RFR: 8257148: Remove obsolete code in AWTView.m

[Vladimir Kempik]

Clean backport of 8257148. 
This removes some dead code in AWTView.m which uses functions not available in arm64 version of JRS framework from macos

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Commit messages:
 - Backport c2af27beb09d7c1db8cb465759404bb9a633be80

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/10/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=10&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8257148
  Stats: 95 lines in 3 files changed: 0 ins; 94 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/10.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/10/head:pull/10

PR: https://git.openjdk.java.net/jdk11u-dev/pull/10