Integrated: 8324784: [lworld] remove constant propagation code and tests

[Vicente Romero]

removing experimental code related to constant propagation of instance fields in primitive classes

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Commit messages:
 - 8324784: [lworld] remove constant propagation code and tests

Changes: https://git.openjdk.org/valhalla/pull/978/files
 Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=978&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8324784
  Stats: 198 lines in 8 files changed: 0 ins; 195 del; 3 mod
  Patch: https://git.openjdk.org/valhalla/pull/978.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/978/head:pull/978

PR: https://git.openjdk.org/valhalla/pull/978