Состояние сплайсинга реагирует
const array = [...this.state.people];
array.splice(i, 1);
this.setState({people: array});
Mystic Dev
const array = [...this.state.people];
array.splice(i, 1);
this.setState({people: array}); const array = [...this.state.people];
array.splice(i, 1);
this.setState({people: array});