Remove EXT_direct_state_access (unused)

Change-Id: I501fab7be512f5a0c4b26d666bbf883de4b73a59
Reviewed-on: https://skia-review.googlesource.com/105902
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
7 files changed