[OpenJDK 2D-Dev] RFR: 8263486: Clean up MTLSurfaceDataBase.h

[Ajit Ghaisas]

This PR addresses some cleanup activities :
- Cleaned up MTLSurfaceDataBase.h & MTLSurfaceData.m
- Removed OpenGL references from MTLPipelineStatesStorage.m  & MTLRenderQueue.m

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Commit messages:
 - cleanup unused code

Changes: https://git.openjdk.java.net/jdk/pull/4010/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=4010&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8263486
  Stats: 68 lines in 5 files changed: 0 ins; 41 del; 27 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4010.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4010/head:pull/4010

PR: https://git.openjdk.java.net/jdk/pull/4010