test: psa driver: Remove unnecessary IV generation

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/tests/src/drivers/test_driver_cipher.c b/tests/src/drivers/test_driver_cipher.c
index 89a7b59..755f6a0 100644
--- a/tests/src/drivers/test_driver_cipher.c
+++ b/tests/src/drivers/test_driver_cipher.c
@@ -64,8 +64,6 @@
     if( mbedtls_test_driver_cipher_hooks.forced_status != PSA_SUCCESS )
         return( mbedtls_test_driver_cipher_hooks.forced_status );
 
-    psa_generate_random( output, PSA_CIPHER_IV_LENGTH( attributes->core.type, alg ) );
-
     return( mbedtls_transparent_test_driver_cipher_encrypt(
                 attributes, key_buffer, key_buffer_size,
                 alg, input, input_length,