Minor - remove todo comment

- Difference between the tests is actually explained in the other class' javadoc

src/test/java/fr/xephi/authme/settings/ConfigFileConsistencyTest.java

@@ -31,7 +31,7 @@ public class ConfigFileConsistencyTest {
     private static final String CONFIG_FILE = "/config.yml";
 
     @Test
-    public void shouldHaveAllConfigs() throws IOException { // TODO ljacqu: How is this different from SettingsMigrationServiceTest?
+    public void shouldHaveAllConfigs() throws IOException {
         // given
         File configFile = TestHelper.getJarFile(CONFIG_FILE);
         FileConfiguration configuration = YamlConfiguration.loadConfiguration(configFile);