fix: one system slug for bermuda syndrome

bermuda.yml (the EmuELEC build) and bsyndrome.yml (RetroBat's bs.exe)
document the same cyxx/bermuda engine under two slugs, bermuda-syndrome
and bsyndrome, so the site gave the game two system pages. bsyndrome now
files its entries under bermuda-syndrome.

scripts/siterender.py

@@ -890,7 +890,6 @@ SYSTEM_NAMES: dict[str, str] = {
     "bermuda-syndrome": "Bermuda Syndrome game",
     "brezzasoft-crystal": "BrezzaSoft Crystal System",
     "bshift": "Half-Life: Blue Shift",
-    "bsyndrome": "Bermuda Syndrome game",
     "caesar3": "Caesar III",
     "cambridge-z88": "Cambridge Computer Z88",
     "camplynx": "Camputers Lynx",