Fix noisy hashCode/equals implementations for Family

Signed-off-by: Anton Gustafsson <antag99@gmail.com>

ashley/src/com/badlogic/ashley/core/Family.java

@@ -160,21 +160,12 @@ public Family get () {
 
 	@Override
 	public int hashCode () {
-		final int prime = 31;
-		int result = 1;
-		result = prime * result + all.hashCode();
-		result = prime * result + one.hashCode();
-		result = prime * result + exclude.hashCode();
-		result = prime * result + index;
-		return result;
+		return index;
 	}
 
 	@Override
 	public boolean equals (Object obj) {
-		if (this == obj) return true;
-		if (!(obj instanceof Family)) return false;
-		Family other = (Family)obj;
-		return index == other.index && all.equals(other.all) && one.equals(other.one) && exclude.equals(other.exclude);
+		return this == obj;
 	}
 
 	private static String getFamilyHash (Bits all, Bits one, Bits exclude) {