message: fix NPEs when deleting mentions
diff: @@ -1038,7 +1038,6 @@ export default class MessageComposerInput extends React.Component {
  data: { completion, completionId, url: href },
  // we can't put text in here otherwise the editor tries to select it
  isVoid: true,
  - nodes: [],
  });
  } else if (completion === '@room') {
  inline = Inline.create({
  @@ -1046,7 +1045,6 @@ export default class MessageComposerInput extends React.Component {
  data: { completion, completionId },
  // we can't put text in here otherwise the editor tries to select it
  isVoid: true,
  - nodes: [],
  });
  } else {
  inline = Inline.create({
  