files: don't save the state of the terminal a second time

The user will understand that changing the state of the terminal
while inputting data into nano is not the same as changing this
state before nano has started or after nano has exited.

This fixes https://savannah.gnu.org/bugs/?56394.

Bug existed since version 2.4.2.

src/nano.c

@@ -1113,10 +1113,6 @@ bool scoop_stdin(void)
 	dup2(thetty, 0);
 	close(thetty);
 
-	/* If things went well, store the current state of the terminal. */
-	if (!control_C_was_pressed)
-		tcgetattr(0, &oldterm);
-
 	/* Restore the original ^C handler, the terminal setup, and curses mode. */
 	restore_handler_for_Ctrl_C();
 	terminal_init();