Remove obsolete @ts-ignore

src/codecs/oxipng/encoder.ts

@@ -1,4 +1,3 @@
-// @ts-ignore
 import optimiser from '../../../codecs/oxipng';
 import { EncodeOptions } from './encoder-meta';
 

src/codecs/processor.ts

@@ -62,12 +62,10 @@ export default class Processor {
 
         if (!this._worker && needsWorker) {
           // worker-loader does magic here.
-          // @ts-ignore - Typescript doesn't know about the 2nd param to new Worker, and the
-          // definition can't be overwritten.
           this._worker = new Worker(
             './processor-worker',
             { name: 'processor-worker', type: 'module' },
-          ) as Worker;
+          );
           // Need to do some TypeScript trickery to make the type match.
           this._workerApi = proxy(this._worker) as any as ProcessorWorkerApi;
         }