docs(ngModel.NgModelController): Remove "newer browsers only" clarification on contenteditable

[jkjustjoshing]

contenteditable is supported in many more browsers than Angular itself is.

http://caniuse.com/#feat=contenteditable

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[jkjustjoshing]

Signed!

On Tue, Feb 24, 2015 at 2:35 PM, googlebot notifications@github.com wrote:

Thanks for your pull request.

It looks like this may be your first contribution to a Google open source
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#11172 (comment).

[googlebot]

CLAs look good, thanks!