Remove unsafe #__PURE__ annotation

[Andarist]

Terser's output with this annotation:

import r from"cssjanus";export const STYLIS_PROPERTY_CONTEXT=-1;function t(t,o){if(-1===t)return r.transform(o)}export default t;

Notice that Object.defineProperty call is gone, because of a #__PURE__ annotation put before it. That annotation should be IMHO used only before calls that are assigned to smth, so like:

var foo = /*#__PURE__*/ createFoo()

so when foo stays unused then createFoo can be dropped as well.