Remove useless attachToDocument property

attachToDocument property is not needed

spec/frontend/boards/issue_card_spec.js

@@ -50,7 +50,6 @@ describe('Issue card component', () => {
         rootPath: '/',
       },
       store,
-      attachToDocument: true,
     });
   });
 

spec/frontend/cycle_analytics/limit_warning_component_spec.js

@@ -10,7 +10,6 @@ const createComponent = props =>
     propsData: {
       ...props,
     },
-    attachToDocument: true,
   });
 
 describe('Limit warning component', () => {

spec/frontend/jobs/components/erased_block_spec.js

@@ -13,7 +13,6 @@ describe('Erased block', () => {
   const createComponent = props => {
     wrapper = mount(ErasedBlock, {
       propsData: props,
-      attachToDocument: true,
     });
   };
 

spec/frontend/notes/components/discussion_actions_spec.js

@@ -35,7 +35,6 @@ describe('DiscussionActions', () => {
         shouldShowJumpToNextDiscussion: true,
         ...props,
       },
-      attachToDocument: true,
     });
   };
 

spec/frontend/releases/detail/components/app_spec.js

@@ -31,7 +31,6 @@ describe('Release detail component', () => {
 
     wrapper = mount(ReleaseDetailApp, {
       store,
-      attachToDocument: true,
     });
 
     return wrapper.vm.$nextTick();