[code-reflection] RFR: [hat] rollback CUDA specific scheduler

[Juan Fumero]

Remove the CUDA Specific scheduler from the kernel context.

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Commit messages:
 - [hat] rollback CUDA specific scheduler

Changes: https://git.openjdk.org/babylon/pull/592/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=592&range=00
  Stats: 17 lines in 3 files changed: 0 ins; 16 del; 1 mod
  Patch: https://git.openjdk.org/babylon/pull/592.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/592/head:pull/592

PR: https://git.openjdk.org/babylon/pull/592