refactor: drop unopened flycast bios archives

emulators/flycast.yml

@@ -49,6 +49,11 @@ notes: |
   Flash/NVRAM search pattern (sb_mem.cpp:231):
     {prefix}nvmem.bin, {prefix}flash_wb.bin, {prefix}flash.bin, {prefix}flash.bin.bin
 
+  BIOS[] also declares airlbios and naomigd. No entry of Games[] carries
+  either name in its bios field and naomi_LoadBios is only ever called with
+  that field or the literal naomi, so neither archive is opened.
+  ref: naomi_cart.cpp:78,228-239,475-478, naomi_roms.h:79,191
+
 files:
   # -------------------------------------------------------
   # Sega Dreamcast
@@ -103,13 +108,6 @@ files:
       Also used for NAOMI 2 games in the libretro port (no separate naomi2.zip).
     source_ref: "core/hw/naomi/naomi_roms.h:133-188"
 
-  - name: "airlbios.zip"
-    path: "dc/airlbios.zip"
-    system: sega-naomi
-    required: false
-    note: "Airline Pilots Deluxe BIOS. epr-21802.ic27 (Export), epr-21801.ic27 (USA)."
-    source_ref: "core/hw/naomi/naomi_roms.h:78-85"
-
   - name: "f355bios.zip"
     path: "dc/f355bios.zip"
     system: sega-naomi
@@ -131,13 +129,6 @@ files:
     note: "House of the Dead 2 BIOS. Japan/USA/Export variants."
     source_ref: "core/hw/naomi/naomi_roms.h:121-131"
 
-  - name: "naomigd.zip"
-    path: "dc/naomigd.zip"
-    system: sega-naomi
-    required: false
-    note: "NAOMI GD-ROM BIOS. Shares ROMs with naomi.zip (epr-21576h, epr-21578h, epr-21577h)."
-    source_ref: "core/hw/naomi/naomi_roms.h:190-212"
-
   # -------------------------------------------------------
   # Sega Atomiswave
   # -------------------------------------------------------