struct card, #4/6, drop typedef card

For readability and to allow variables to have the name "card"
(avoid name collision with typedef "card")

src/include/ngspice/inpdefs.h

@@ -14,7 +14,6 @@ Modified: 2000 AlansFixes
 #include "ngspice/inpptree.h"
 
 typedef struct INPtables INPtables;
-typedef struct card card;
 typedef struct INPmodel INPmodel;