revert: remove ELO rank feature (data source inaccessible)

stat-check.com's ELO data is behind Microsoft auth with no public
API or download endpoint available. Removing the sync script,
placeholder JSON, CI job, table column, and all related JS.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

scripts/sync-elo.py

@@ -1,111 +0,0 @@
-"""
-sync-elo.py — download the stat-check.com ELO Excel sheet and emit public/elo-data.json.
-
-Column auto-detection: scans the header row for keywords.
-If headers change, check the CI log — it always prints what it found.
-"""
-
-import json
-import sys
-from datetime import datetime, timezone
-from io import BytesIO
-
-import requests
-import openpyxl
-
-DOWNLOAD_URL = (
-    "https://excel.officeapps.live.com/x/_layouts/XlFileHandler.aspx?WacUserType=WOPI&usid=4bcd36aa-91bc-4c95-a692-c2ef5de1d13a&NoAuth=1&waccluster=PCA1"
-)
-OUTPUT_PATH = "public/elo-data.json"
-
-
-def find_col(headers, *keywords):
-    """Return index of first header containing any keyword (case-insensitive)."""
-    for i, h in enumerate(headers):
-        hl = str(h).lower()
-        if any(kw in hl for kw in keywords):
-            return i
-    return None
-
-
-def main():
-    print(f"Downloading ELO sheet…", flush=True)
-    resp = requests.get(DOWNLOAD_URL, timeout=120, headers={"User-Agent": "Mozilla/5.0"})
-    resp.raise_for_status()
-
-    content_type = resp.headers.get("Content-Type", "")
-    print(f"Downloaded {len(resp.content):,} bytes  Content-Type: {content_type}", flush=True)
-
-    # Diagnose non-Excel responses before attempting to parse
-    if "html" in content_type.lower() or not resp.content.startswith(b"PK"):
-        print("ERROR: Response is not an Excel/ZIP file. First 500 chars:", flush=True)
-        print(resp.content[:500].decode("utf-8", errors="replace"), flush=True)
-        sys.exit(1)
-
-    wb = openpyxl.load_workbook(BytesIO(resp.content), read_only=True, data_only=True)
-    ws = wb.active
-
-    rows = ws.iter_rows(values_only=True)
-    raw_headers = next(rows)
-    headers = [str(c).strip() if c is not None else "" for c in raw_headers]
-    print(f"Headers ({len(headers)}): {headers}", flush=True)
-
-    rank_col   = find_col(headers, "rank")
-    name_col   = find_col(headers, "name", "player")
-    rating_col = find_col(headers, "rating", "elo", "score", "points")
-
-    if name_col is None:
-        print("ERROR: Could not find a name/player column. Check the headers above.", file=sys.stderr)
-        sys.exit(1)
-
-    print(
-        f"Mapped  rank→col {rank_col} ('{headers[rank_col] if rank_col is not None else '—'}')  "
-        f"name→col {name_col} ('{headers[name_col]}')  "
-        f"rating→col {rating_col} ('{headers[rating_col] if rating_col is not None else '—'}')",
-        flush=True,
-    )
-
-    by_name = {}
-    skipped = 0
-    for seq, row in enumerate(rows, start=2):
-        raw_name = row[name_col] if len(row) > name_col else None
-        if not raw_name:
-            skipped += 1
-            continue
-
-        name    = str(raw_name).strip()
-        key     = name.lower()
-
-        raw_rank   = row[rank_col]   if rank_col is not None and len(row) > rank_col   else None
-        raw_rating = row[rating_col] if rating_col is not None and len(row) > rating_col else None
-
-        try:
-            rank = int(raw_rank) if raw_rank is not None else seq
-        except (ValueError, TypeError):
-            rank = seq
-
-        try:
-            rating = round(float(raw_rating), 1) if raw_rating is not None else None
-        except (ValueError, TypeError):
-            rating = None
-
-        by_name[key] = {"rank": rank, "rating": rating, "name": name}
-
-    wb.close()
-
-    print(f"Parsed {len(by_name):,} players ({skipped} blank rows skipped)", flush=True)
-
-    output = {
-        "updated": datetime.now(timezone.utc).strftime("%Y-%m-%dT%H:%M:%SZ"),
-        "count": len(by_name),
-        "byName": by_name,
-    }
-
-    with open(OUTPUT_PATH, "w", encoding="utf-8") as f:
-        json.dump(output, f, separators=(",", ":"), ensure_ascii=False)
-
-    print(f"Wrote {OUTPUT_PATH}", flush=True)
-
-
-if __name__ == "__main__":
-    main()