* remove unused codes * refactor: remove unused parseAccessModifier * refactor: remove redundant async function checks * refactor: remove redundant class check in checkExport * add more parser test cases * Update packages/babel-parser/src/parser/statement.js Co-authored-by: Brian Ng <bng412@gmail.com> * chore: add sourceType: unambiguous test Co-authored-by: Brian Ng <bng412@gmail.com>