remove warning that is no longer in dart:html

remove warning that is no longer in dart:html
TBR to fix dart2js bot.

Committed: https://code.google.com/p/dart/source/detail?r=24503

[Jennifer Messerly, 2013-06-27 00:44:51]

for what it's worth: I thought I ran the test this time, but I must've ran it
incorrectly. I was able to reproduce the error via:

python tools/test.py -m release --checked dart2js/analyze_api_test

[Jennifer Messerly, 2013-06-27 00:45:14]

Committed patchset #1 manually as r24503 (presubmit successful).

[ahe, 2013-06-27 08:19:28]

lgtm

[ahe, 2013-06-27 08:22:46]

On 2013/06/27 00:44:51, John Messerly wrote:
> for what it's worth: I thought I ran the test this time, but I must've ran it
> incorrectly. I was able to reproduce the error via:
> 
> python tools/test.py -m release --checked dart2js/analyze_api_test

I know it is too complicated testing dart2js, but at least it is documented :-)

But what does that help if you don't know where the documentation is? So for
future reference, here it is:

https://code.google.com/p/dart/wiki/TestingDart2js#Basic_test_recommendation

[Jennifer Messerly, 2013-06-27 18:19:10]

On 2013/06/27 08:22:46, ahe wrote:
> On 2013/06/27 00:44:51, John Messerly wrote:
> > for what it's worth: I thought I ran the test this time, but I must've ran
it
> > incorrectly. I was able to reproduce the error via:
> > 
> > python tools/test.py -m release --checked dart2js/analyze_api_test
> 
> I know it is too complicated testing dart2js, but at least it is documented
:-)
> 
> But what does that help if you don't know where the documentation is? So for
> future reference, here it is:
> 
> https://code.google.com/p/dart/wiki/TestingDart2js#Basic_test_recommendation

Thanks Peter, that link is very helpful! I'll keep in mind the dart2js_developer
script, it sounds very useful.