Not working? Still strict?

[pmorch]

What am I doing wrong? It looks like it is still strict to me...

> ls -a
.  ..  loose.js

> cat loose.js 
var foo = 'bar';
delete foo;

> yarn add babel-cli babel-preset-es2015-without-strict
(installs packages)

> echo '{
>   "presets": ["es2015-without-strict"]
> }' > .babelrc

> cat .babelrc 
{
  "presets": ["es2015-without-strict"]
}

> ./node_modules/.bin/babel loose.js --presets es2015-without-strict 
SyntaxError: loose.js: Deleting local variable in strict mode (2:0)
  1 | var foo = 'bar';
> 2 | delete foo;
    | ^
  3 |