Remove duplicated md.h includes

Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>

programs/pkey/pk_sign.c

@@ -39,7 +39,6 @@ int main(void)
 #include "mbedtls/error.h"
 #include "mbedtls/entropy.h"
 #include "mbedtls/ctr_drbg.h"
-#include "mbedtls/md.h"
 #include "mbedtls/pk.h"
 
 #include <stdio.h>

programs/pkey/pk_verify.c

@@ -35,7 +35,6 @@ int main(void)
 #else
 
 #include "mbedtls/error.h"
-#include "mbedtls/md.h"
 #include "mbedtls/pk.h"
 
 #include <stdio.h>

programs/pkey/rsa_sign.c

@@ -35,7 +35,6 @@ int main(void)
 #else
 
 #include "mbedtls/rsa.h"
-#include "mbedtls/md.h"
 
 #include <stdio.h>
 #include <string.h>

programs/pkey/rsa_sign_pss.c

@@ -38,7 +38,6 @@ int main(void)
 
 #include "mbedtls/entropy.h"
 #include "mbedtls/ctr_drbg.h"
-#include "mbedtls/md.h"
 #include "mbedtls/rsa.h"
 #include "mbedtls/pk.h"
 

programs/pkey/rsa_verify.c

@@ -35,7 +35,6 @@ int main(void)
 #else
 
 #include "mbedtls/rsa.h"
-#include "mbedtls/md.h"
 
 #include <stdio.h>
 #include <string.h>

programs/pkey/rsa_verify_pss.c

@@ -39,7 +39,6 @@ int main(void)
 #include "mbedtls/md.h"
 #include "mbedtls/pem.h"
 #include "mbedtls/pk.h"
-#include "mbedtls/md.h"
 
 #include <stdio.h>
 #include <string.h>

programs/x509/cert_write.c

@@ -42,7 +42,6 @@ int main(void)
 #include "mbedtls/oid.h"
 #include "mbedtls/entropy.h"
 #include "mbedtls/ctr_drbg.h"
-#include "mbedtls/md.h"
 #include "mbedtls/error.h"
 #include "test/helpers.h"