Remove custom CodeQL workflow, use GitHub default setup instead

The repo has CodeQL default setup enabled (Python + Actions, extended
query suite, weekly schedule) which conflicts with a custom workflow.
Removed codeql.yml and switched badge to static "enabled".

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: aksOps

.github/workflows/codeql.yml

@@ -18,7 +18,7 @@
   <a href="https://github.com/RandomCodeSpace/code-iq"><img src="https://img.shields.io/github/repo-size/RandomCodeSpace/code-iq?style=flat-square&logo=github&label=Repo%20Size" alt="Repo Size"></a>
   <a href="https://github.com/RandomCodeSpace/code-iq/security"><img src="https://img.shields.io/badge/security-audited-purple?style=flat-square&logo=shieldsdotio&logoColor=white" alt="Security"></a>
   <a href="https://github.com/RandomCodeSpace/code-iq/security/dependabot"><img src="https://img.shields.io/badge/dependabot-enabled-brightgreen?style=flat-square&logo=dependabot&logoColor=white" alt="Dependabot enabled"></a>
-  <a href="https://github.com/RandomCodeSpace/code-iq/security/code-scanning"><img src="https://img.shields.io/github/actions/workflow/status/RandomCodeSpace/code-iq/codeql.yml?branch=main&style=flat-square&logo=github&label=CodeQL" alt="CodeQL"></a>
+  <a href="https://github.com/RandomCodeSpace/code-iq/security/code-scanning"><img src="https://img.shields.io/badge/CodeQL-enabled-brightgreen?style=flat-square&logo=github&logoColor=white" alt="CodeQL"></a>
   <!-- DYNAMIC:vulnerabilities --><a href="https://github.com/RandomCodeSpace/code-iq/security/dependabot"><img src="https://img.shields.io/badge/vulnerabilities-0-brightgreen?style=flat-square&logo=hackthebox&logoColor=white" alt="0 Vulnerabilities"></a><!-- /DYNAMIC:vulnerabilities -->
   <!-- DYNAMIC:detectors --><a href="https://github.com/RandomCodeSpace/code-iq"><img src="https://img.shields.io/badge/detectors-58-brightgreen?style=flat-square&logo=codefactor&logoColor=white" alt="58 Detectors"></a><!-- /DYNAMIC:detectors -->
   <!-- DYNAMIC:languages --><a href="https://github.com/RandomCodeSpace/code-iq"><img src="https://img.shields.io/badge/languages-33-blue?style=flat-square&logo=stackblitz&logoColor=white" alt="33 Languages"></a><!-- /DYNAMIC:languages -->