Remove obsolete comment
diff --git a/programs/test/selftest.c b/programs/test/selftest.c
index 43add34..869c7b6 100644
--- a/programs/test/selftest.c
+++ b/programs/test/selftest.c
@@ -417,6 +417,5 @@
     if( suites_failed > 0)
         mbedtls_exit( MBEDTLS_EXIT_FAILURE );
 
-    /* return() is here to prevent compiler warnings */
     mbedtls_exit( MBEDTLS_EXIT_SUCCESS );
 }