Replace Deprecated class-constrained Protocol with AnyObject

[keisukeYamagishi]

Overview

This change replaces the usage of the class keyword to define a class-constrained protocol with AnyObject. This addresses the deprecation warning related to the class keyword.

Changes Made

Updated the previous class-constrained protocol definition to use AnyObject.

Before

protocol MyProtocol: class {
    // Protocol content
}

After

protocol MyProtocol: AnyObject {
    // Protocol content
}