Remove unused variable

Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
diff --git a/library/pkcs5.c b/library/pkcs5.c
index a6bc1b5..1e3b17e 100644
--- a/library/pkcs5.c
+++ b/library/pkcs5.c
@@ -322,7 +322,6 @@
     mbedtls_md_free( &md_ctx );
     return( ret );
 #else
-    int j;
     unsigned int i;
     unsigned char md1[PSA_HASH_MAX_SIZE];
     unsigned char work[PSA_HASH_MAX_SIZE];