Remove useless attachToDocument property

attachToDocument property is not needed

spec/frontend/environments/environment_monitoring_spec.js

@@ -9,7 +9,6 @@ describe('Monitoring Component', () => {
 
   const createWrapper = () => {
     wrapper = shallowMount(MonitoringComponent, {
-      attachToDocument: true,
       propsData: {
         monitoringUrl,
       },

spec/frontend/environments/environment_rollback_spec.js

@@ -13,7 +13,6 @@ describe('Rollback Component', () => {
         isLastDeployment: true,
         environment: {},
       },
-      attachToDocument: true,
     });
 
     expect(wrapper.element).toHaveSpriteIcon('repeat');
@@ -26,7 +25,6 @@ describe('Rollback Component', () => {
         isLastDeployment: false,
         environment: {},
       },
-      attachToDocument: true,
     });
 
     expect(wrapper.element).toHaveSpriteIcon('redo');

spec/frontend/environments/environment_stop_spec.js

@@ -11,7 +11,6 @@ describe('Stop Component', () => {
 
   const createWrapper = () => {
     wrapper = shallowMount(StopComponent, {
-      attachToDocument: true,
       propsData: {
         environment: {},
       },

spec/frontend/environments/environment_terminal_button_spec.js

@@ -7,7 +7,6 @@ describe('Stop Component', () => {
 
   const mountWithProps = props => {
     wrapper = shallowMount(TerminalComponent, {
-      attachToDocument: true,
       propsData: props,
     });
   };