SF: remove usage of eVsyncSourceSurfaceFlinger

Bug: 162235855
Change-Id: I8326ce03fd3f6f007defe1487f2925164a679827
Test: presubmit
diff --git a/services/surfaceflinger/common/FlagManager.cpp b/services/surfaceflinger/common/FlagManager.cpp
index 12043d4..5a54f7d 100644
--- a/services/surfaceflinger/common/FlagManager.cpp
+++ b/services/surfaceflinger/common/FlagManager.cpp
@@ -141,6 +141,7 @@
     DUMP_READ_ONLY_FLAG(idle_screen_refresh_rate_timeout);
     DUMP_READ_ONLY_FLAG(graphite_renderengine);
     DUMP_READ_ONLY_FLAG(latch_unsignaled_with_auto_refresh_changed);
+    DUMP_READ_ONLY_FLAG(deprecate_vsync_sf);
 
 #undef DUMP_READ_ONLY_FLAG
 #undef DUMP_SERVER_FLAG
@@ -232,6 +233,7 @@
 FLAG_MANAGER_READ_ONLY_FLAG(ce_fence_promise, "");
 FLAG_MANAGER_READ_ONLY_FLAG(graphite_renderengine, "debug.renderengine.graphite")
 FLAG_MANAGER_READ_ONLY_FLAG(latch_unsignaled_with_auto_refresh_changed, "");
+FLAG_MANAGER_READ_ONLY_FLAG(deprecate_vsync_sf, "");
 
 /// Trunk stable server flags ///
 FLAG_MANAGER_SERVER_FLAG(refresh_rate_overlay_on_external_display, "")