fix(ransomware-live): keyless — drop optional API key, no auth required

Ransomware.live's v2 API is free and needs no authentication. Remove the
optional api_key config field and the X-API-KEY header logic from all commands
so instance creation requires no credentials. Only an optional base_url override
remains.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

integrations/ransomware-live/scripts/test_connection.py

@@ -14,9 +14,6 @@ def _inputs():
 def _get(cfg, path):
     base = (cfg.get("base_url") or DEFAULT_BASE).rstrip("/")
     headers = {"User-Agent": "Riposte-SOAR", "Accept": "application/json"}
-    key = str(cfg.get("api_key") or "").strip()
-    if key:
-        headers["X-API-KEY"] = key
     req = urllib.request.Request(base + path, headers=headers)
     with urllib.request.urlopen(req, timeout=60) as r:
         raw = r.read()