Remove duplicated md.h includes

Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
diff --git a/programs/pkey/pk_sign.c b/programs/pkey/pk_sign.c
index 554fdf4..3335575 100644
--- a/programs/pkey/pk_sign.c
+++ b/programs/pkey/pk_sign.c
@@ -39,7 +39,6 @@
 #include "mbedtls/error.h"
 #include "mbedtls/entropy.h"
 #include "mbedtls/ctr_drbg.h"
-#include "mbedtls/md.h"
 #include "mbedtls/pk.h"
 
 #include <stdio.h>
diff --git a/programs/pkey/pk_verify.c b/programs/pkey/pk_verify.c
index db730fb..a6d3481 100644
--- a/programs/pkey/pk_verify.c
+++ b/programs/pkey/pk_verify.c
@@ -35,7 +35,6 @@
 #else
 
 #include "mbedtls/error.h"
-#include "mbedtls/md.h"
 #include "mbedtls/pk.h"
 
 #include <stdio.h>
diff --git a/programs/pkey/rsa_sign.c b/programs/pkey/rsa_sign.c
index 8fb01bb..1308be2 100644
--- a/programs/pkey/rsa_sign.c
+++ b/programs/pkey/rsa_sign.c
@@ -35,7 +35,6 @@
 #else
 
 #include "mbedtls/rsa.h"
-#include "mbedtls/md.h"
 
 #include <stdio.h>
 #include <string.h>
diff --git a/programs/pkey/rsa_sign_pss.c b/programs/pkey/rsa_sign_pss.c
index e4a776e..643ac47 100644
--- a/programs/pkey/rsa_sign_pss.c
+++ b/programs/pkey/rsa_sign_pss.c
@@ -38,7 +38,6 @@
 
 #include "mbedtls/entropy.h"
 #include "mbedtls/ctr_drbg.h"
-#include "mbedtls/md.h"
 #include "mbedtls/rsa.h"
 #include "mbedtls/pk.h"
 
diff --git a/programs/pkey/rsa_verify.c b/programs/pkey/rsa_verify.c
index 248b562..f65883d 100644
--- a/programs/pkey/rsa_verify.c
+++ b/programs/pkey/rsa_verify.c
@@ -35,7 +35,6 @@
 #else
 
 #include "mbedtls/rsa.h"
-#include "mbedtls/md.h"
 
 #include <stdio.h>
 #include <string.h>
diff --git a/programs/pkey/rsa_verify_pss.c b/programs/pkey/rsa_verify_pss.c
index 684f6d2..bc2ea64 100644
--- a/programs/pkey/rsa_verify_pss.c
+++ b/programs/pkey/rsa_verify_pss.c
@@ -39,7 +39,6 @@
 #include "mbedtls/md.h"
 #include "mbedtls/pem.h"
 #include "mbedtls/pk.h"
-#include "mbedtls/md.h"
 
 #include <stdio.h>
 #include <string.h>
diff --git a/programs/x509/cert_write.c b/programs/x509/cert_write.c
index b8f68b9..9ff9488 100644
--- a/programs/x509/cert_write.c
+++ b/programs/x509/cert_write.c
@@ -42,7 +42,6 @@
 #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"