Remove a few unused imports & variables.

src/main/java/com/gmail/nossr50/skills/repair/Repair.java

@@ -1,6 +1,5 @@
 package com.gmail.nossr50.skills.repair;
 
-import java.lang.reflect.Field;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.Random;

src/main/java/com/gmail/nossr50/util/Database.java

@@ -287,9 +287,6 @@ public class Database {
         boolean isValid = false;
         boolean exists = (connection != null);
 
-        // Initialized as needed later
-        long timestamp=0;
-
         // If we're waiting for server to recover then leave early
         if (nextReconnectTimestamp > 0 && nextReconnectTimestamp > System.nanoTime()) {
             return false;

src/main/java/com/gmail/nossr50/util/Permissions.java

@@ -4,8 +4,6 @@ import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
 
 public class Permissions {
-    private static volatile Permissions instance;
-
     public static boolean hasPermission(CommandSender sender, String perm)
     {
         if(sender.hasPermission(perm))