Remove unused class.

I had no idea this class existed, but it seems like it's actually never
been used for anything, since the commit that introduced it didn't even
use it either.

src/main/java/com/garbagemule/MobArena/util/EntityPosition.java

@@ -1,90 +0,0 @@
-package com.garbagemule.MobArena.util;
-
-import org.bukkit.Location;
-import org.bukkit.World;
-
-import java.io.Serializable;
-
-/**
- * NOTE: I (garbagemule) DID NOT WRITE THIS CLASS (notice the author below)
- * @author creadri
- */
-@SuppressWarnings("serial")
-public class EntityPosition implements Serializable{
-    private double x;
-    private double y;
-    private double z;
-    private String world;
-    private float yaw;
-    private float pitch;
-
-    public EntityPosition(double x, double y, double z, String world, float yaw, float pitch) {
-        this.x = x;
-        this.y = y;
-        this.z = z;
-        this.world = world;
-        this.yaw = yaw;
-        this.pitch = pitch;
-    }
-
-    public EntityPosition(Location location) {
-        this.x = location.getX();
-        this.y = location.getY();
-        this.z = location.getZ();
-        this.world = location.getWorld().getName();
-        this.yaw = location.getYaw();
-        this.pitch = location.getPitch();
-    }
-
-    public Location getLocation(World world) {
-        return new Location(world, x, y, z, yaw, pitch);
-    }
-
-    public float getPitch() {
-        return pitch;
-    }
-
-    public void setPitch(float pitch) {
-        this.pitch = pitch;
-    }
-
-    public String getWorld() {
-        return world;
-    }
-
-    public void setWorld(String world) {
-        this.world = world;
-    }
-
-    public double getX() {
-        return x;
-    }
-
-    public void setX(double x) {
-        this.x = x;
-    }
-
-    public double getY() {
-        return y;
-    }
-
-    public void setY(double y) {
-        this.y = y;
-    }
-
-    public float getYaw() {
-        return yaw;
-    }
-
-    public void setYaw(float yaw) {
-        this.yaw = yaw;
-    }
-
-    public double getZ() {
-        return z;
-    }
-
-    public void setZ(double z) {
-        this.z = z;
-    }
-}