message: use splice correctly after removing a local alias
diff: @@ -235,7 +235,7 @@ export default class AliasSettings extends React.Component {
  // to this room. See https://github.com/vector-im/riot-web/issues/7353
  MatrixClientPeg.get().deleteAlias(alias).then(() => {
  const localAliases = this.state.localAliases.slice();
  - localAliases.splice(index);
  + localAliases.splice(index, 1);
  this.setState({localAliases});
  if (this.state.canonicalAlias === alias) {
  