Remove some unnecessary config code

Author: gstoehl27

ch-covidcertificate-backend-transformation/ch-covidcertificate-backend-transformation-ws/src/test/java/ch/admin/bag/covidcertificate/backend/transformation/ws/config/TestConfig.java

@@ -26,12 +26,6 @@
 @Configuration
 public class TestConfig extends WsBaseConfig {
 
-    @Autowired DataSource dataSource;
-
-    public DataSource dataSource() {
-        return dataSource;
-    }
-
     @Bean
     @Override
     public Flyway flyway(DataSource dataSource) {