Remove backed-up duplicate skills to fix validation pipeline

skills/implementing-rsa-key-pair-management/SKILL.md

@@ -14,6 +14,21 @@ license: Apache-2.0
 
 RSA (Rivest-Shamir-Adleman) is the most widely deployed asymmetric cryptographic algorithm, used for digital signatures, key exchange, and encryption. This skill covers generating, storing, rotating, and managing RSA key pairs following NIST SP 800-57 key management guidelines, including key serialization formats (PEM, DER, PKCS#8), passphrase protection, and key strength validation.
 
+
+## When to Use
+
+- When deploying or configuring implementing rsa key pair management 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 cryptography 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
+
 ## Objectives
 
 - Generate RSA key pairs with appropriate key sizes (2048, 3072, 4096 bits)