rm-viewbox

Default configuration:

{
	"rules": {
		"rm-viewbox": true
	}
}

Explanation:
- When x, y, width, height are exactly the same, remove viewBox property

E.g:

<svg width="1000" height="600" viewBox="0 0 1000 600">

After optimization will become:

<svg width="1000" height="600">