video/logo: Remove linux_serial_image comments

The last user of the serial_console ASCII image was removed in v2.1.115.

Signed-off-by: Geert Uytterhoeven <[e-mail]>
Signed-off-by: Helge Deller <[e-mail]>

include/linux/linux_logo.h

···
  *  Copyright (C) 2001 Greg Banks <[e-mail]>
  *  Copyright (C) 2001 Jan-Benedict Glaw <[e-mail]>
  *  Copyright (C) 2003 Geert Uytterhoeven <[e-mail]>
- *
- *  Serial_console ascii image can be any size,
- *  but should contain %s to display the version
  */
 
 #include <linux/init.h>