refactor(test/e2e): remove explicit call to waitForAngular()

Protractor automatically calls `waitForAngular()`, before every WebDriver action.

Closes #14920

test/e2e/tests/angular-already-loadedSpec.js

@@ -1,6 +1,6 @@
 describe('App where angular is loaded more than once', function() {
   beforeEach(function() {
-    loadFixture('angular-already-loaded').andWaitForAngular();
+    loadFixture('angular-already-loaded');
   });
 
   it('should have the interpolated text', function() {

test/e2e/tests/helpers/main.js

@@ -1,7 +1,4 @@
 var helper = {
-  andWaitForAngular: function() {
-    browser.waitForAngular();
-  },
   loadFixture: function(fixture) {
     var i = 0;
     while (fixture[i] === '/') ++i;

test/e2e/tests/loaderSpec.js

@@ -1,6 +1,6 @@
 describe('angular-loader', function() {
   beforeEach(function() {
-    loadFixture('loader').andWaitForAngular();
+    loadFixture('loader');
   });
 
   it('should not be broken by loading the modules before core', function() {

test/e2e/tests/ngJqSpec.js

@@ -1,11 +1,11 @@
 describe('Customizing the jqLite / jQuery version', function() {
   it('should be able to force jqLite', function() {
-    loadFixture('ngJq').andWaitForAngular();
+    loadFixture('ngJq');
     expect(element(by.binding('jqueryVersion')).getText()).toBe('jqLite');
   });
 
   it('should be able to use a specific version jQuery', function() {
-    loadFixture('ngJqJquery').andWaitForAngular();
+    loadFixture('ngJqJquery');
     expect(element(by.binding('jqueryVersion')).getText()).toBe('2.1.0');
   });
 });

test/e2e/tests/sampleSpec.js

@@ -1,7 +1,7 @@
 // Sample E2E test:
 describe('Sample', function() {
   beforeEach(function() {
-    loadFixture('sample').andWaitForAngular();
+    loadFixture('sample');
   });
 
   it('should have the interpolated text', function() {