Remove custom conflicting JavaScript snippet.

This was causing warnings every time a new vim instance opened a .js file for the first time. Needless to say, it's annoying. The regression this will cause is that f<tab> will now use "function(${1}) {${2}};" or something like that.

Closes #112.
Merge pull request #113 from square/donovan/remove-custom-conflicting-javascript-snippet

Remove custom conflicting JavaScript snippet.
Merge branch 'master' into mine