Remove no-longer needed test

Introduced in
https://gitlab.com/gitlab-org/gitlab-ce/commit/715ecfab2f6b34d77e206859a95eae269e4c0d52

spec/javascripts/repo/components/repo_tabs_spec.js

@@ -29,14 +29,6 @@ describe('RepoTabs', () => {
     expect(tabs[2].classList.contains('tabs-divider')).toBeTruthy();
   });
 
-  it('does not render a tabs list if not isMini', () => {
-    RepoStore.openedFiles = [];
-
-    const vm = createComponent();
-
-    expect(vm.$el.innerHTML).toBeFalsy();
-  });
-
   describe('methods', () => {
     describe('xClicked', () => {
       it('calls removeFromOpenedFiles with file obj', () => {