Remove inactive users in VM WG

Author: beyhan

toc/working-groups/vulnerability-management.md

@@ -22,14 +22,12 @@ Provides discreet management of security vulnerabilities issues relevant for act
 
 * Add security-related features to Cloud Foundry projects.
 
-## Technical Lead(s): 
+## Technical Lead(s):
 - [Paul Warren](https://github.com/paulcwarren)
 
 ## Execution Lead(s):
 - [Monty Ijzerman](https://github.com/ijzerman)
 - [Khushboo Soni](https://github.com/skhushboo-vm)
-- [Mathias Essenpreis](https://github.com/Essenpreis) 
-- [Prateek Mehrotra](https://github.com/mehrotra-prateek)
 
 ## Roles & Technical Assets
 
@@ -47,10 +45,6 @@ execution_leads:
   github: ijzerman
 - name: Khushboo Soni
   github: skhushboo-vm
-- name: Mathias Essenpreis
-  github: Essenpreis
-- name: Prateek Mehrotra
-  github: mehrotra-prateek
 technical_leads:
 - name: Paul Warren
   github: paulcwarren