Adapt uses of `mbedtls_rsa_complete` to removed PRNG argument
diff --git a/programs/pkey/rsa_decrypt.c b/programs/pkey/rsa_decrypt.c
index 48275bc..2da3fbf 100644
--- a/programs/pkey/rsa_decrypt.c
+++ b/programs/pkey/rsa_decrypt.c
@@ -142,8 +142,7 @@
         goto exit;
     }
 
-    if( ( return_val = mbedtls_rsa_complete( &rsa, mbedtls_ctr_drbg_random,
-                                             &ctr_drbg ) ) != 0 )
+    if( ( return_val = mbedtls_rsa_complete( &rsa ) ) != 0 )
     {
         mbedtls_printf( " failed\n  ! mbedtls_rsa_complete returned %d\n\n",
                         return_val );