Remove unused variable.
 [rsc] --rw-rw-r-- M 451989 glenda sys 6420 Nov  6 11:11 sys/src/cmd/upas/smtp/mxdial.c
	/n/sourcesdump/2005/1106/plan9/sys/src/cmd/upas/smtp/mxdial.c:49,55 - 
	/n/sourcesdump/2005/1107/plan9/sys/src/cmd/upas/smtp/mxdial.c:49,55
	  }
	  
	  static int
	- timeout(void *x, char *msg)
	+ timeout(void*, char *msg)
	  {
	  	if(strstr(msg, "alarm"))
	  		return 1;