(fix:radio-groups) preserve the radio input's checked state after handling a state change

Do not manually toggle the input's checked state, the browser already does this for inputs in the same group.
https://developer.mozilla.org/en-US/docs/Mozilla/Tech/XUL/Attribute/group

src/generators/dom/visitors/attributes/addElementBinding.js

@@ -59,9 +59,7 @@ export default function createBinding ( generator, node, attribute, current, loc
 			setter = deindent`
 				if ( !${local.name}.checked ) return;
 				${setter}
-				component._bindingGroups[${bindingGroup}].forEach( function ( input ) {
-					input.checked = false;
-				});`;
+			`;
 		}
 
 		const condition = type === 'checkbox' ?
@@ -158,4 +156,4 @@ function getBindingGroup ( generator, current, attribute, keypath ) {
 	}
 
 	return index;
-}
+}