Disable pylint unused arg in __new__

Signed-off-by: Werner Lewis <werner.lewis@arm.com>
diff --git a/scripts/mbedtls_dev/test_generation.py b/scripts/mbedtls_dev/test_generation.py
index 23d9c7e..652b9a1 100644
--- a/scripts/mbedtls_dev/test_generation.py
+++ b/scripts/mbedtls_dev/test_generation.py
@@ -53,6 +53,7 @@
     test_name = ""
 
     def __new__(cls, *args, **kwargs):
+        # pylint: disable=unused-argument
         cls.count += 1
         return super().__new__(cls)