Remove unused variables BC, UP and my_PC

These appear to be a hangover from old termcap-using code, but there's nothing in BX that uses them anymore.

source/term.c

@@ -64,8 +64,6 @@ static	int		tty_des;		/* descriptor for the tty */
 
 static	struct	termios	oldb, newb;
 
-	char		my_PC, *BC, *UP;
-	int		BClen, UPlen;
 extern	int		already_detached;
 
 #if !defined(WTERM_C)
@@ -874,22 +872,6 @@ int term_init (char *term)
 		}
 	}
 
-	BC = current_term->TI_cub1;
-	UP = current_term->TI_cuu1;
-	if (current_term->TI_pad)
-		my_PC = current_term->TI_pad[0];
-	else
-		my_PC = 0;
-
-	if (BC)
-		BClen = strlen(BC);
-	else
-		BClen = 0;
-	if (UP)
-		UPlen = strlen(UP);
-	else
-		UPlen = 0;
-
 	li = current_term->TI_lines;
 	co = current_term->TI_cols;
 	if (!co)