ISDN: Remove ISDN_STAT_L1ERR

It wasn't used in any actual hardware driver, nor did it cause any
action at all.

drivers/isdn/i4l/isdn_common.c

@@ -1307,8 +1307,6 @@ isdn_status_callback(isdn_ctrl * c)
 			restore_flags(flags);
 			break;
 #endif
-		case ISDN_STAT_L1ERR:
-			break;
 		case CAPI_PUT_MESSAGE:
 			return(isdn_capi_rec_hl_msg(&c->parm.cmsg));
 #ifdef CONFIG_ISDN_TTY_FAX

drivers/isdn/isdnloop/isdnloop.c

@@ -71,9 +71,6 @@ isdnloop_bchan_send(isdnloop_card * card, int ch)
 				printk(KERN_WARNING "isdnloop: no rcard, skb dropped\n");
 				dev_kfree_skb(skb);
 
-				cmd.command = ISDN_STAT_L1ERR;
-				cmd.parm.errcode = ISDN_STAT_L1ERR_SEND;
-				card->interface.statcallb(&cmd); 
 			};
 			cmd.command = ISDN_STAT_BSENT;
 			cmd.parm.length = len;

include/linux/isdnif.h

@@ -208,7 +208,6 @@ typedef struct
 #define ISDN_STAT_REDIR   272    /* Redir result                          */
 #define ISDN_STAT_PROT    273    /* protocol IO specific callback         */
 #define ISDN_STAT_DISPLAY 274    /* deliver a received display message    */
-#define ISDN_STAT_L1ERR   275    /* Signal Layer-1 Error                  */
 #define ISDN_STAT_FAXIND  276    /* FAX indications from HL-driver        */
 #define ISDN_STAT_AUDIO   277    /* DTMF, DSP indications                 */
 #define ISDN_STAT_DISCH   278    /* Disable/Enable channel usage          */
@@ -219,12 +218,6 @@ typedef struct
 #define ISDN_AUDIO_SETDD	0	/* Set DTMF detection           */
 #define ISDN_AUDIO_DTMF		1	/* Rx/Tx DTMF                   */
 
-/*
- * Values for errcode field
- */
-#define ISDN_STAT_L1ERR_SEND 1
-#define ISDN_STAT_L1ERR_RECV 2
-
 /*
  * Values for feature-field of interface-struct.
  */