Remove unneeded test for the CCM free function
diff --git a/tests/suites/test_suite_ccm.function b/tests/suites/test_suite_ccm.function
index 95ebe43..1886339 100644
--- a/tests/suites/test_suite_ccm.function
+++ b/tests/suites/test_suite_ccm.function
@@ -525,9 +525,6 @@
                                        valid_buffer, valid_buffer,
                                        NULL, valid_len ) );
 
-    /* mbedtls_ccm_free() */
-    TEST_INVALID_PARAM( mbedtls_ccm_free( NULL ) );
-
 exit:
     mbedtls_ccm_free( &ctx );
     return;