[Misc] Remove unnecessary code

xwiki-platform-core/xwiki-platform-oldcore/src/test/java/com/xpn/xwiki/store/migration/XWikiMigrationManagerTest.java

@@ -87,7 +87,7 @@ public void migrate()
         @Override
         protected List<DataMigration> getAllMigrations()
         {
-            List<DataMigration> lst = new ArrayList<DataMigration>();
+            List<DataMigration> lst = new ArrayList<>();
             lst.add(createMigrator(345));
             lst.add(createMigrator(123));
             lst.add(createMigrator(456));
@@ -99,7 +99,7 @@ protected List<DataMigration> getAllMigrations()
         XWikiDBVersion curversion;
 
         @Override
-        protected void initializeEmptyDB() throws DataMigrationException
+        protected void initializeEmptyDB()
         {
         }
 
@@ -131,7 +131,7 @@ protected void setUp() throws Exception
         super.setUp();
         getContext().setWiki(new XWiki() {
             @Override
-            public List<String> getVirtualWikisDatabaseNames(XWikiContext context) throws XWikiException
+            public List<String> getVirtualWikisDatabaseNames(XWikiContext context)
             {
                 return Arrays.asList("xwiki");
             }
@@ -143,8 +143,7 @@ public List<String> getVirtualWikisDatabaseNames(XWikiContext context) throws XW
     /** test migration if there are no data version */
     public void testMigrationWhenNoVersion() throws Exception
     {
-        TestDataMigrationManager mm = (TestDataMigrationManager) getComponentManager().getInstance(
-            DataMigrationManager.class,"TestDataMigration");
+        TestDataMigrationManager mm = getComponentManager().getInstance(DataMigrationManager.class,"TestDataMigration");
         Collection neededMigration = mm.getNeededMigrations();
         assertEquals(0, neededMigration.size());
         mm.startMigrations();
@@ -198,7 +197,7 @@ public boolean shouldExecute(XWikiDBVersion startupVersion)
         }
 
         @Override
-        public void migrate() throws DataMigrationException
+        public void migrate()
         {
         }
     }