Update to spigot 1.9. Remove 1.6.4-1.7.10 compat.

src/com/cnaude/chairs/core/Chairs.java

@@ -7,6 +7,7 @@ import java.util.List;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
+import org.bukkit.Bukkit;
 import org.bukkit.ChatColor;
 import org.bukkit.Material;
 import org.bukkit.configuration.file.FileConfiguration;
@@ -85,7 +86,7 @@ public class Chairs extends JavaPlugin {
 	@Override
 	public void onDisable() {
 		if (psitdata != null) {
-			for (Player player : Utils.getOnlinePlayers()) {
+			for (Player player : Bukkit.getOnlinePlayers()) {
 				if (psitdata.isSitting(player)) {
 					psitdata.unsitPlayerForce(player);
 				}

src/com/cnaude/chairs/core/Utils.java

@@ -1,12 +0,0 @@
-package com.cnaude.chairs.core;
-
-import org.bukkit.Bukkit;
-import org.bukkit.entity.Player;
-
-public class Utils {
-
-	public static Player[] getOnlinePlayers() {
-		return Bukkit.getOnlinePlayers();
-	}
-
-}