Remove redundant device property setting for reduceOpsTaskSplitting

This feature has been flipped to on for everyone,
no need to have device-specific settings.

This reverts commit daf9469deb6acc79b17a45081f3e834a8180d961.

Bug: 183612348
Bug: 185920634
Change-Id: I884e7285da510089dbbe378690ee530643adf820
(cherry picked from commit 86c972612687272e35b91b76e89727db7e3cc87d)
1 file changed