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))
 
@@ -211,20 +212,25 @@ static void SendVersion(void)
 
 static bool IsBadChallenge(const uint32_t *pKey, const uint32_t *pIn, const uint32_t *pResponse)
 {
-	unsigned int i;
-	uint32_t     IV[4];
+	#ifdef ENABLE_FEAT_F4HWN
+		UNUSED(pKey);
+	    UNUSED(pIn);
+	    UNUSED(pResponse);
+    #else
+		unsigned int i;
+		uint32_t     IV[4];
 
-	IV[0] = 0;
-	IV[1] = 0;
-	IV[2] = 0;
-	IV[3] = 0;
+		IV[0] = 0;
+		IV[1] = 0;
+		IV[2] = 0;
+		IV[3] = 0;
 
-	AES_Encrypt(pKey, IV, pIn, IV, true);
-
-	for (i = 0; i < 4; i++)
-		if (IV[i] != pResponse[i])
-			return true;
+		AES_Encrypt(pKey, IV, pIn, IV, true);
 
+		for (i = 0; i < 4; i++)
+			if (IV[i] != pResponse[i])
+				return true;
+	#endif
 	return false;
 }