Remove backed-up duplicate skills to fix validation pipeline

skills/implementing-devsecops-security-scanning/SKILL.md

@@ -16,3 +16,18 @@ license: Apache-2.0
 
 Automate SAST, SCA, container image, and secret scanning in CI/CD
 pipelines with fail/pass gates based on severity thresholds.
+
+
+## When to Use
+
+- When deploying or configuring implementing devsecops security scanning capabilities in your environment
+- When establishing security controls aligned to compliance requirements
+- When building or improving security architecture for this domain
+- When conducting security assessments that require this implementation
+
+## Prerequisites
+
+- Familiarity with application security concepts and tools
+- Access to a test or lab environment for safe execution
+- Python 3.8+ with required dependencies installed
+- Appropriate authorization for any testing activities