ensure modernizr can run inside an iframe

[patrickkettner]

fixes #887

[patrickkettner]

so none of the code from #887 exists any longer, and from my local testing of this change there is no longer any issue actually running the full build inside of an iframe.

@mikkotikkanen can you confirm that all that was needed to ensure its not broken is loading and parsing the script inside of the context of the iframe?

cc @ryanseddon @stucox

[modernizr-savage]

Tests passed. Automated cross-browser testing via Sauce Labs and Travis CI shows that the JavaScript changes in this pull request are: CONFIRMED

Commit: 2c98c24
Build details: https://travis-ci.org/modernizr-savage/Modernizr/builds/59092585

(Please note that this is a fully automated comment.)

[mikkotikkanen]

Not really working on that project anymore, so no idea (my pull request is over 2 years old :P ). The test seems OK, though it's missing the case of running the Modernizr inside a scope.

Something along the lines of...

(function() {
  <insert Modernizr here>
})();

...so that this doesn't point to window.

[patrickkettner]

we are not using this anymore, so we should be golden.