fix Xcode warning about shadowed generic parameter

shadowed generic parameter should not be used. for more detail, see https://forums.swift.org/t/why-is-shadowing-a-generic-parameter-an-error-in-swift-6/65540/2

Sources/SwiftyRemoteConfig/RemoteConfigObserver.swift

@@ -35,7 +35,7 @@ public final class RemoteConfigObserver<T: RemoteConfigSerializable>: NSObject,
             }
         }
 
-        private static func deserialize<T: RemoteConfigSerializable>(_ value: RemoteConfigValue?, for key: RemoteConfigKey<T>) -> T.T? where T.T == T {
+        private static func deserialize(_ value: RemoteConfigValue?, for key: RemoteConfigKey<T>) -> T.T? where T.T == T {
             guard let value = value else {
                 return nil
             }