staging: i4l: act2000: remove unused macro

The macro EVAL_PLCI and MAKE_PLCI are not being used. Remove them.
But keep the comment preceding them as it contains information
regarding message format.

Signed-off-by: Sudip Mukherjee <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/i4l/act2000/capi.h

···
  * Bit 5-7  = Controller
  * Bit 8-15 = reserved (must be 0)
  */
-#define MAKE_PLCI(plci, contr)			\
-	((plci & 0x1f) | ((contr & 0x7) << 5))
-
-#define EVAL_PLCI(fakeplci, plci, contr) {	\
-		plci  = fakeplci & 0x1f;	\
-		contr = (fakeplci >> 5) & 0x7;	\
-	}
 
 typedef struct actcapi_msg {
 	actcapi_msghdr hdr;