chore(transformer): Removed unused imports

Author: martinjlowm

src/transformer/descriptor/method/methodSignature.ts

@@ -1,8 +1,6 @@
 import * as ts from 'typescript';
 import { Scope } from '../../scope/scope';
-import { GetDescriptor } from '../descriptor';
 import { TypescriptCreator } from '../../helper/creator';
-import { GetNullDescriptor } from '../null/null';
 import { GetMethodDescriptor } from './method';
 
 export function GetMethodSignatureDescriptor(node: ts.MethodSignature, scope: Scope): ts.Expression {