get rid of unnecessary class

src/ser/identity.ts

@@ -1,73 +0,0 @@
-import { ISerializeIterable, ISerializeObject, ISerializer, SerializeIterable, SerializeObject } from './interface'
-
-class IdentityMap<T> extends SerializeObject<T> {
-  private value: Record<any, any> = {}
-  private currentKey?: string
-
-  serializeKey(key: string): void {
-    this.currentKey = key
-  }
-
-  serializeValue<U>(value: U): void {
-    this.value[this.currentKey!] = value
-  }
-
-  end(): T {
-    return this.value
-  }
-}
-
-class IdentityIterable<T> extends SerializeIterable<T> {
-  private value: any[] = []
-
-  serializeElement<U>(value: U): void {
-    this.value.push(value)
-  }
-
-  end(): T {
-    return this.value as T
-  }
-}
-
-export class IdentitySerializer<T> implements ISerializer<T> {
-  serializeAny?(value: any): T {
-    return value as T
-  }
-
-  serializeBoolean(value: boolean): T {
-    return value as T
-  }
-
-  serializeNumber(value: number): T {
-    return value as T
-  }
-
-  serializeBigInt(value: bigint): T {
-    return value as T
-  }
-
-  serializeString(value: string): T {
-    return value as T
-  }
-
-  serializeSymbol(value: symbol): T {
-    return value as T
-  }
-
-  serializeNull(): T {
-    return null as T
-  }
-
-  serializeIterable(_len?: number): ISerializeIterable<T> {
-    return new IdentityIterable()
-  }
-
-  serializeObject(_len?: number): ISerializeObject<T> {
-    return new IdentityMap()
-  }
-
-  serializeClass(_name: string, _len?: number): ISerializeObject<T> {
-    return new IdentityMap()
-  }
-}
-

src/ser/index.ts

@@ -1,4 +1,3 @@
-export * from './identity'
 export * from './impl'
 export * from './interface'