Remove backed-up duplicate skills to fix validation pipeline

skills/performing-web-application-vulnerability-triage/SKILL.md

@@ -15,6 +15,14 @@ license: Apache-2.0
 
 Web application vulnerability triage is the process of reviewing findings from DAST (Dynamic Application Security Testing) and SAST (Static Application Security Testing) tools to validate true positives, dismiss false positives, assign risk ratings using the OWASP Risk Rating Methodology, and prioritize remediation. Effective triage reduces alert fatigue and focuses development teams on the vulnerabilities that matter most.
 
+
+## When to Use
+
+- When conducting security assessments that involve performing web application vulnerability triage
+- When following incident response procedures for related security events
+- When performing scheduled security testing or auditing activities
+- When validating security controls through hands-on testing
+
 ## Prerequisites
 
 - DAST scan results (OWASP ZAP, Burp Suite, Acunetix)