OS (macOS): remove useless code

Author: CarterLi

src/detection/os/os_apple.m

@@ -64,7 +64,7 @@ static bool detectOSCodeName(FFOSResult* os)
                 case 6: ffStrbufSetStatic(&os->codename, "Snow Leopard"); return true;
                 case 5: ffStrbufSetStatic(&os->codename, "Leopard"); return true;
                 case 4: ffStrbufSetStatic(&os->codename, "Tiger"); return true;
-                case 3: ffStrbufSetStatic(&os->codename, "Panther"); ffStrbufSetStatic(&os->prettyName, "Mac OS X"); return true;
+                case 3: ffStrbufSetStatic(&os->codename, "Panther"); return true;
                 case 2: ffStrbufSetStatic(&os->codename, "Jaguar"); return true;
                 case 1: ffStrbufSetStatic(&os->codename, "Puma"); return true;
                 case 0: ffStrbufSetStatic(&os->codename, "Cheetah"); return true;