Revert "SurfaceFlinger: add stack guards around SurfaceFlinger::postComposition"

This reverts commit 8164d48b4cb5f27ebb74e7f03875eb2b3b4b89b0.

Test: boot and open some apps
Bug: 122839222
Change-Id: I5ed78c6380a7a96af3c4435f2de1ca40452a71d3
2 files changed