Remove mysterious AES_Encrypt call

app/uart.c

@@ -42,6 +42,7 @@
 	#include "sram-overlay.h"
 #endif
 
+#define UNUSED(x) (void)(x)
 
 #define DMA_INDEX(x, y) (((x) + (y)) % sizeof(UART_DMA_Buffer))
 
@@ -211,6 +212,11 @@ static void SendVersion(void)
 
 static bool IsBadChallenge(const uint32_t *pKey, const uint32_t *pIn, const uint32_t *pResponse)
 {
+	#ifdef ENABLE_FEAT_F4HWN
+		UNUSED(pKey);
+	    UNUSED(pIn);
+	    UNUSED(pResponse);
+    #else
 		unsigned int i;
 		uint32_t     IV[4];
 
@@ -224,7 +230,7 @@ static bool IsBadChallenge(const uint32_t *pKey, const uint32_t *pIn, const uint
 		for (i = 0; i < 4; i++)
 			if (IV[i] != pResponse[i])
 				return true;
-
+	#endif
 	return false;
 }