[BUG] DOMElement's reactRoot doesn't need to be removed from parentNode if parent already destroyed.

[trusktr]

Here's a temporary fix:

DOMElement.prototype._famousReactRootDestroy = function _famousReactRootDestroy() {
    let reactRoot = this._famousReactRoot;
    if (reactRoot) {
        this._famousUnmountReact(reactRoot);
        if (reactRoot.parentNode)
            reactRoot.parentNode.removeChild(reactRoot);
        this._famousReactRoot = null;
    }
}

the difference is checking if (reactRoot.parentNode). Seems like it's null due to some prior cleanup steps.

[trusktr]

I'm doing lots of testing. I'll make some PRs soon. :]