SF: Clean up remaining display identifiers

Bug: 74619554
Test: Build
Change-Id: Icd8457b6496f02c6010c724cfa6ae678f6e01adf
diff --git a/services/surfaceflinger/BufferLayer.cpp b/services/surfaceflinger/BufferLayer.cpp
index 133e8f7..36eb9e3 100644
--- a/services/surfaceflinger/BufferLayer.cpp
+++ b/services/surfaceflinger/BufferLayer.cpp
@@ -706,8 +706,7 @@
         mProducer->setMaxDequeuedBufferCount(2);
     }
 
-    const sp<const DisplayDevice> hw(mFlinger->getDefaultDisplayDevice());
-    updateTransformHint(hw);
+    updateTransformHint(mFlinger->getDefaultDisplayDevice());
 }
 
 // ---------------------------------------------------------------------------