Remove async option from SQLite#vacuum()

src/main/java/de/epiceric/shopchest/ShopChest.java

@@ -251,7 +251,7 @@ public class ShopChest extends JavaPlugin {
 
         if (database != null) {
             if (database instanceof SQLite) {
-                ((SQLite) database).vacuum(false);
+                ((SQLite) database).vacuum();
             }
 
             database.disconnect();

src/main/java/de/epiceric/shopchest/sql/SQLite.java

@@ -52,33 +52,20 @@ public class SQLite extends Database {
     }
 
     /**
-     * Vacuums the database to reduce file size
+     * Vacuums the database synchronously to reduce file size
-     * 
-     * @param async Whether the call should be executed asynchronously
      */
-    public void vacuum(boolean async) {
+    public void vacuum() {
-        BukkitRunnable runnable = new BukkitRunnable() {
-            @Override
-            public void run() {
         try (Connection con = dataSource.getConnection();
                 Statement s = con.createStatement()) {
             s.executeUpdate("VACUUM");
 
             plugin.debug("Vacuumed SQLite database");
         } catch (final SQLException ex) {
-                    plugin.getLogger().severe("Failed to vacuum database");
+            plugin.getLogger().warning("Failed to vacuum database");
             plugin.debug("Failed to vacuum database");
             plugin.debug(ex);
         }
     }
-        };
-
-        if (async) {
-            runnable.runTaskAsynchronously(plugin);
-        } else {
-            runnable.run();
-        }
-    }
 
     @Override
     String getQueryCreateTableShops() {