Fix Vue warning on workerTypes property in workers list

src/views/Process/Workers/List.vue

@@ -181,7 +181,7 @@ export default {
     async fetchWorkerTypes () {
       this.loading = true
       try {
-        this.workerTypes = await this.listWorkerTypes()
+        await this.listWorkerTypes()
       } catch (err) {
         this.notify({ type: 'error', text: `An error occurred listing worker types: ${errorParser(err)}` })
       } finally {