IVGCVSW-4246 Clean build end-to-end tests with -Wextra

Change-Id: Ia25f919e45a210e1e2d5d50b0c9098bf01d88013
Signed-off-by: Derek Lamberti <derek.lamberti@arm.com>
diff --git a/tests/TfLiteVGG16Quantized-Armnn/TfLiteVGG16Quantized-Armnn.cpp b/tests/TfLiteVGG16Quantized-Armnn/TfLiteVGG16Quantized-Armnn.cpp
index 030f01c..8da553f 100644
--- a/tests/TfLiteVGG16Quantized-Armnn/TfLiteVGG16Quantized-Armnn.cpp
+++ b/tests/TfLiteVGG16Quantized-Armnn/TfLiteVGG16Quantized-Armnn.cpp
@@ -39,7 +39,7 @@
                      "input",                   // input tensor name
                      "vgg_16/fc8/squeezed",     // output tensor name
                      { 0, 1, 2 },               // test images to test with as above
-                     [&imageSet](const char* dataDir, const ModelType & model) {
+                     [&imageSet](const char* dataDir, const ModelType &) {
                          // we need to get the input quantization parameters from
                          // the parsed model
                          return DatabaseType(