Revert "Add useVrFlinger() method to SurfaceFlinger ConfigStore"

This reverts commit d78f6b34b68af98e3a59e90edcf19493fc986e12.

broke multiple builds, e.g.
https://android-build.googleplex.com/builds/submitted/3833064/test_suites_x86_64_fastbuild3d_linux/latest/logs

Change-Id: Id0dea5b63fad8896a186486d137d8505aad12c26
4 files changed