tab expands abbreviations inside javascript files

[ferrao]

Documentation says :

Currently, Emmet expands abbreviations by Tab key only for HTML, CSS, Sass/SCSS and LESS syntaxes.

This does not seem to be the case, emmet is expanding inside regular javascript files on atom by default, I am using v2.4.3

[sergeche]

It is used to expand abbreviations for React

[ferrao]

That's what I was guessing @sergeche, but then i suggest that we update the README and include information on how to remove it.