[Slider] Remove touchend event listener

[brian-growratio]

I added the touchend event listener to fix #12922

[oliviertassinari]

@brian-growratio It's a great first pull request on Material-UI 👌🏻. Thank you for working on it!

[brian-growratio]

Any time, thanks for the hard work guys!

[brian-growratio]

@oliviertassinari Sorry to bother you on this one line fix, but this is actually a pretty breaking problem in my app, and the last version without it was 1.0.0-alpha.12 which is missing quite a few fixes.

I was wondering if you know when the fix will be pushed to the npm repo.

Again, thank you for all the hard work on this library, this open source community has easily made a better component library than anything I've seen before.

[oliviertassinari]

@brian-growratio The fix will be released this weekend.

[brian-growratio]

Thank you so much!

In the rare case that someone needs this right now and can't wait for the fix to be applied, here's a temporary fix you can use in your code (for React v16 and greater) that uses a slider:

class YourComponent extends React.Component {
    constructor(props){
        super(props);
        this.sliderRef = React.createRef();
    }

    handleDragEnd = (event) => {
        document.body.removeEventListener('touchend', this.sliderRef.current.handleMouseUp);
        ...<rest of your drag end event code>
    }

    render() {
        return (
            <Slider <your props> innerRef={this.sliderRef} />
        );
    }
}