SF: remove the redundant variable on updateCursorAsync.

Change-Id: If6ef98316d9af2f3a623de7cdf62c63b4f8ba90e
Signed-off-by: linkai <linkai@xiaomi.com>
diff --git a/services/surfaceflinger/CompositionEngine/src/CompositionEngine.cpp b/services/surfaceflinger/CompositionEngine/src/CompositionEngine.cpp
index 15fadbc..002177b 100644
--- a/services/surfaceflinger/CompositionEngine/src/CompositionEngine.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/CompositionEngine.cpp
@@ -111,8 +111,6 @@
 }
 
 void CompositionEngine::updateCursorAsync(CompositionRefreshArgs& args) {
-    std::unordered_map<compositionengine::LayerFE*, compositionengine::LayerFECompositionState*>
-            uniqueVisibleLayers;
 
     for (const auto& output : args.outputs) {
         for (auto* layer : output->getOutputLayersOrderedByZ()) {