Remove unnecessary parameter in MPS reader unit test

Signed-off-by: Hanno Becker <hanno.becker@arm.com>
diff --git a/tests/suites/test_suite_mps.data b/tests/suites/test_suite_mps.data
index 158302b..f25d703 100644
--- a/tests/suites/test_suite_mps.data
+++ b/tests/suites/test_suite_mps.data
@@ -119,4 +119,4 @@
 mbedtls_reader_inconsistent_usage:8
 
 MPS Reader: Feed with invalid buffer (NULL)
-mbedtls_mps_reader_feed_empty:0
+mbedtls_mps_reader_feed_empty: