Moved json parsing out of service

[ci skip]

app/assets/javascripts/issue_show/components/app.vue

@@ -77,6 +77,7 @@ export default {
     },
     deleteIssuable() {
       this.service.deleteIssuable()
+        .then(res => res.json())
         .then((data) => {
           // Stop the poll so we don't get 404's with the issue not existing
           this.poll.stop();

app/assets/javascripts/issue_show/services/index.js

@@ -20,12 +20,10 @@ export default class Service {
   }
 
   deleteIssuable() {
-    return this.resource.delete()
-      .then(res => res.json());
+    return this.resource.delete();
   }
 
   updateIssuable(data) {
-    return this.resource.update(data)
-      .then(res => res.json());
+    return this.resource.update(data);
   }
 }

spec/javascripts/issue_show/components/app_spec.js

@@ -134,7 +134,9 @@ describe('Issuable output', () => {
       spyOn(gl.utils, 'visitUrl');
       spyOn(vm.service, 'deleteIssuable').and.callFake(() => new Promise((resolve) => {
         resolve({
-          path: '/test',
+          json() {
+            return { path: '/test' };
+          },
         });
       }));
 
@@ -154,7 +156,9 @@ describe('Issuable output', () => {
       spyOn(vm.poll, 'stop');
       spyOn(vm.service, 'deleteIssuable').and.callFake(() => new Promise((resolve) => {
         resolve({
-          path: '/test',
+          json() {
+            return { path: '/test' };
+          },
         });
       }));