Camera: remove warning from VTS test

Test: pass
Change-Id: I8028577c5589aa7234dd55c7602aeb807f25501d
diff --git a/camera/provider/2.4/vts/functional/VtsHalCameraProviderV2_4TargetTest.cpp b/camera/provider/2.4/vts/functional/VtsHalCameraProviderV2_4TargetTest.cpp
index 19bc899..846d9a4 100644
--- a/camera/provider/2.4/vts/functional/VtsHalCameraProviderV2_4TargetTest.cpp
+++ b/camera/provider/2.4/vts/functional/VtsHalCameraProviderV2_4TargetTest.cpp
@@ -810,7 +810,7 @@
 
             int32_t streamId = 0;
             for (auto &inputIter : inputOutputMap) {
-                AvailableStream input, output;
+                AvailableStream input;
                 ASSERT_EQ(Status::OK,
                         findLargestSize(inputStreams, inputIter.inputFormat, input));
                 ASSERT_NE(0u, inputStreams.size());