Revert "fix: variable not defined may be involved in condition checking"
Revert "fix: variable not defined may be involved in condition checking"

This reverts commit e8ffce9783a696af37451e8ff0b5501cf09777ee.

schoolfes/schoolfes.github.io,schoolfes/schoolfes.github.io,sifhelper/sifhelper.github.io,sifhelper/sifhelper.github.io