[code-reflection] Integrated: Removing opencl and cuda warnings nvidia

[Gary Frost]

On Nvidia machines opencl and cuda reported warnings about unused vars in generated C99 code.

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Commit messages:
 - Removing opencl and cuda warnings nvidia

Changes: https://git.openjdk.org/babylon/pull/757/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=757&range=00
  Stats: 22 lines in 13 files changed: 1 ins; 3 del; 18 mod
  Patch: https://git.openjdk.org/babylon/pull/757.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/757/head:pull/757

PR: https://git.openjdk.org/babylon/pull/757