Remove the call to sync() from ansi_getlines()

This was needed back in the v2 days to be sure the escape sequence was sent
*after* an output buffer before might've been cleared by a user's abort/Ctrl-C
action. SYNC/ASYNC called riosync() which called rioctl(TXSYNC) and we have no
equivalent in Synchronet for TCP/IP (modern sbbs). A user's Ctrl-C will clear
all pending I/O, but won't prevent subsequent output from being sent (until
the abort condition is cleared) as used to be the case with serial I/O.

src/sbbs3/ansiterm.cpp

@@ -197,7 +197,6 @@ void sbbs_t::ansi_getlines()
 	if(sys_status&SS_USERON && useron.misc&ANSI
 		&& (useron.rows == TERM_ROWS_AUTO || useron.cols == TERM_COLS_AUTO)
 		&& online==ON_REMOTE) {									/* Remote */
-		sync();
 		putcom("\x1b[s\x1b[255B\x1b[255C\x1b[6n\x1b[u");
 		inkey(K_ANSI_CPR,TIMEOUT_ANSI_GETXY*1000); 
 	}