get rid of fmt dependency since we are on C++23

src/backend/GameDB.cpp

@@ -21,7 +21,7 @@ void GameDB::match(Mem &mem) {
         return;
       }
 
-      Util::warn(
+      warn(
         "Matched code for {}, but not region! Game supposedly exists in regions [{}] but this image has region {}",
         name, regions, rom.header.countryCode[0]);
       mem.saveType = saveType;
@@ -30,7 +30,7 @@ void GameDB::match(Mem &mem) {
     }
   }
 
-  Util::warn("Did not match any Game DB entries. Code: {} Region: {}", mem.rom.code, mem.rom.header.countryCode[0]);
+  warn("Did not match any Game DB entries. Code: {} Region: {}", mem.rom.code, mem.rom.header.countryCode[0]);
 
   mem.rom.gameNameDB = "";
   mem.saveType = SAVE_NONE;