Prerequisite -
1] Eligibility rule (Rule 1) is created by using classes and status
2] Eligibility rule created in prerequisite 1 is used on EIN Classes Mapping screen

Step
1] Log in to LB
2] Select Company
3] Go to BenAdmin -> Customizer -. Eligibility Rules
4] Select Rule 1 created in prerequisite

Actual Result - Allow to delete the eligibility rule which is in use
Expected Result - Should show proper message like "Eligibility rule is in use, eligibility rule can not be deleted"