message: Add comment to clarify why new identifier
diff: @@ -34,7 +34,7 @@ function updateCode(ast: t.AST, selection: Selection): t.Transformed {
  .filter(isDeclarationInitialized)
  .map(function ({ id, init }) {
  if (id.type == "Identifier" && "typeAnnotation" in id) {
  - id = t.identifier(id.name);
  + id = t.identifier(id.name); // new identifier without annotation
  }
  return t.expressionStatement(t.assignmentExpression("=", id, init));
  })
  