Revert "SurfaceFlinger: give SF its own vsync phase"

This reverts commit 0a645cc5a935e67a8d1effc7679a838160b971d8.
Revert "SurfaceFlinger: Add EventControlThread"

This reverts commit d1700756ec9520c3fba22f9a14fd064a6e288810.
Revert "Filter out vsync events from HWC with duplicate timestamps"

This reverts commit 8e26b28be62e7c0e093900540db5e5cdcf52a0ff.