Remove redundant test_info assignment

`test_fail` automatically sets `test_info.result`. This commit removes a case
where `test_info.result` was being manually set after `test_fail` was called.

Signed-off-by: Chris Jones <christopher.jones@arm.com>

tests/suites/main_test.function

@@ -182,7 +182,6 @@ void execute_function_ptr(TestWrapper_t fp, void **params)
         test_fail( location_record.failure_condition,
                    location_record.line,
                    location_record.file );
-        test_info.result = TEST_RESULT_FAILED;
     }
 
     mbedtls_test_param_failed_reset_state( );