Remove Internet Explorer leftovers

js/tests/unit/modal.spec.js

@@ -653,7 +653,6 @@ describe('Modal', () => {
     it('should enforce focus', done => {
       fixtureEl.innerHTML = '<div class="modal"><div class="modal-dialog" /></div>'
 
-      const isIE11 = Boolean(window.MSInputMethodContext) && Boolean(document.documentMode)
       const modalEl = fixtureEl.querySelector('.modal')
       const modal = new Modal(modalEl)
 
@@ -668,11 +667,6 @@ describe('Modal', () => {
       modalEl.addEventListener('shown.bs.modal', () => {
         expect(modal._enforceFocus).toHaveBeenCalled()
 
-        if (isIE11) {
-          done()
-          return
-        }
-
         spyOn(modal._element, 'focus')
 
         document.addEventListener('focusin', focusInListener)