test(aio): redefine pipe test as a pending test to confirm code example

aio/e2e/app.e2e-spec.ts

@@ -14,9 +14,5 @@ describe('site App', function() {
     });
   });
 
-  it('should convert code-example in pipe.html', () => {
-    page.datePipeLink.click().then(() => {
-      expect(page.codeExample.count()).toBeGreaterThan(0, 'should have code-example content');
-    });
-  });
+  it('should convert a doc with a code-example');
 });