SurfaceFlinger: remove old DispSync implementation

VSyncReactor replaced DispSync implementation which was turned off
by default. This CL is removing the old code.

Test: webgl on emulator
Bug: 162888874
Change-Id: Ia69a06a90462841ec6a91788b071ebbe2276d2cd
diff --git a/services/surfaceflinger/tests/unittests/TestableScheduler.h b/services/surfaceflinger/tests/unittests/TestableScheduler.h
index d78546d..ebb2d76 100644
--- a/services/surfaceflinger/tests/unittests/TestableScheduler.h
+++ b/services/surfaceflinger/tests/unittests/TestableScheduler.h
@@ -42,8 +42,7 @@
                       createLayerHistory(configs, useContentDetectionV2),
                       {.supportKernelTimer = false,
                        .useContentDetection = true,
-                       .useContentDetectionV2 = useContentDetectionV2,
-                       .useVsyncPredictor = false}) {}
+                       .useContentDetectionV2 = useContentDetectionV2}) {}
 
     // Used to inject mock event thread.
     ConnectionHandle createConnection(std::unique_ptr<EventThread> eventThread) {