chore: delete parity harness #222

Job	Run time
jscpd (duplication < 3% on touched code)	13s
Gitleaks (secret scan)	13s
Semgrep (SAST)	21s
OSV-Scanner (SCA)	5s
SBOM (SPDX + CycloneDX)	19s
Trivy (filesystem + container scan)	20s
	1m 31s

Provide feedback