Fix up proc_info conversion in 53c700

The host variable is now passed in, so we shouldn't have a
similar variable defined in the proc_info routine

drivers/scsi/53c700.c

@@ -1709,7 +1709,6 @@ NCR_700_proc_directory_info(struct Scsi_Host *host, char *proc_buf, char **start
 {
 	static char buf[4096];	/* 1 page should be sufficient */
 	int len = 0;
-	struct Scsi_Host *host;
 	struct NCR_700_Host_Parameters *hostdata;
 	Scsi_Device *SDp;