Remove superfluous compat.js

http://drupal.org/node/156221#comment-864612 suggests that compat.js is superfluous now and can be removed by adding another override for textarea.js in core.

Attached patch adds a patched version of textarea.js and removes compat.js from the loaded javascripts.

I'm skeptical whether this will really work out, or if 90% of other modules in contrib will be broken due to this patch.

So, let's test it. To test this patch,
- download the latest development snapshot
- download the most recent patch in this issue into your jquery_update module folder
- apply the patch (see http://drupal.org/patch/apply)
- copy all js files from jquery_update/misc/ into core's misc/ folder

Testing makes only sense on sites that have plenty of other contrib modules installed, which are jQuerified. Testing Drupal core is also required (using this test plan). If you're testing this patch, be sure to test any available JavaScript features of your modules, and use the following schema to report back your results:

Example
Working: jLightbox 1.1, jQuery UI 2.x, jCarousel 1.0, CCK Imagefield 2.1, CCK Link 2.1, Devel 0.3, ...
(always include module version info!)

Patched: Thickbox 1.1 (#999234: option_trim 6.x-2.2), FooModule 2.3 ([#1234567]),...
(include issue numbers of existing patches in parentheses)

Broken: Coder 1.0, #translatable 1.3, ...
(optionally - add hints about browser version+platform, or any other valuable info for other testers here)
End of Example

Don't be too verbose, and please stay on topic. This can only be committed, if all tests pass and/or all conflicts can be resolved.

Thanks,
Daniel