Update appsec.md

Author: devsecopsguides

docs/plan-develop/appsec.md

@@ -61,9 +61,6 @@ Cheatsheet with rules/policies for preventing OWASP Top 10 vulnerabilities
 
 ## DREAD:
 
-![dread](../../../assets/images/dread.png)
-Image by Session Hijacking - Threat Analysis and Countermeasures Article: https://www.researchgate.net/publication/277307339_Session_Hijacking_Threat_Analysis_and_Countermeasures/figures?lo=1
-
 
 * Damage potential: How much damage could be caused if the vulnerability is exploited?
 * Reproducibility: How easy is it to reproduce the vulnerability?