refactor(pty): remove old logic for inheriting termios from host terminal

src/nvim/main.c

@@ -279,15 +279,6 @@ int main(int argc, char **argv)
   // argument list "global_alist".
   command_line_scan(&params);
 
-#ifndef MSWIN
-  int tty_fd = params.input_isatty
-    ? STDIN_FILENO
-    : (params.output_isatty
-       ? STDOUT_FILENO
-       : (params.err_isatty ? STDERR_FILENO : -1));
-  pty_process_save_termios(tty_fd);
-#endif
-
   nlua_init(argv, argc, params.lua_arg0);
   TIME_MSG("init lua interpreter");