docs(guide/bootstrap): remove extra call to angular.module()

There was an extra call to angular.module() not being used in 'getter' mode. While this doesn't
break the demo app, it does look kind of weird, so lets toss it.

Closes #6969

docs/content/guide/bootstrap.ngdoc

@@ -100,7 +100,6 @@ Here is an example of manually initializing Angular:
       }]);
 
     angular.element(document).ready(function() {
-      angular.module('myApp', []);
       angular.bootstrap(document, ['myApp']);
     });
   </script>