SF: Fix contradiction in EventThreadTest

The test was invoking a VSYNC callback right after checking that VSYNC
callbacks are not enabled.

Bug: 123530318
Test: vsyncRequestIsIgnoredIfDisplayIsDisconnected
Change-Id: I5cc997266450e1ecb6ed2cd3901472984053477a
diff --git a/services/surfaceflinger/tests/unittests/EventThreadTest.cpp b/services/surfaceflinger/tests/unittests/EventThreadTest.cpp
index 79fb034..dd90063 100644
--- a/services/surfaceflinger/tests/unittests/EventThreadTest.cpp
+++ b/services/surfaceflinger/tests/unittests/EventThreadTest.cpp
@@ -220,12 +220,6 @@
 
     // EventThread should not enable vsync callbacks.
     EXPECT_FALSE(mVSyncSetEnabledCallRecorder.waitForUnexpectedCall().has_value());
-
-    // Use the received callback to signal a vsync event.
-    // The event should not be received by the interceptor nor the connection.
-    mCallback->onVSyncEvent(123);
-    EXPECT_FALSE(mInterceptVSyncCallRecorder.waitForCall(0us).has_value());
-    EXPECT_FALSE(mConnectionEventCallRecorder.waitForCall(0us).has_value());
 }
 
 TEST_F(EventThreadTest, requestNextVsyncPostsASingleVSyncEventToTheConnection) {