--- a/src/auto/configure
+++ b/src/auto/configure
@@ -12476,103 +12476,6 @@ else
 $as_echo "don't know" >&6; }
 fi
 
-rm -f conftest_grp
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking default tty permissions/group" >&5
-$as_echo_n "checking default tty permissions/group... " >&6; }
-if ${vim_cv_tty_group+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-
-    if test "$cross_compiling" = yes; then :
-
-      as_fn_error $? "cross-compiling: please set 'vim_cv_tty_group' and 'vim_cv_tty_mode'" "$LINENO" 5
-
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-#include "confdefs.h"
-#include <sys/types.h>
-#if STDC_HEADERS
-# include <stdlib.h>
-# include <stddef.h>
-#endif
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-#include <sys/stat.h>
-#include <stdio.h>
-main()
-{
-  struct stat sb;
-  char *x,*ttyname();
-  int om, m;
-  FILE *fp;
-
-  if (!(x = ttyname(0))) exit(1);
-  if (stat(x, &sb)) exit(1);
-  om = sb.st_mode;
-  if (om & 002) exit(0);
-  m = system("mesg y");
-  if (m == -1 || m == 127) exit(1);
-  if (stat(x, &sb)) exit(1);
-  m = sb.st_mode;
-  if (chmod(x, om)) exit(1);
-  if (m & 002) exit(0);
-  if (sb.st_gid == getgid()) exit(1);
-  if (!(fp=fopen("conftest_grp", "w")))
-    exit(1);
-  fprintf(fp, "%d\n", sb.st_gid);
-  fclose(fp);
-  exit(0);
-}
-
-_ACEOF
-if ac_fn_c_try_run "$LINENO"; then :
-
-      if test -f conftest_grp; then
-	vim_cv_tty_group=`cat conftest_grp`
-	if test "x$vim_cv_tty_mode" = "x" ; then
-	  vim_cv_tty_mode=0620
-	fi
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: pty mode: $vim_cv_tty_mode, group: $vim_cv_tty_group" >&5
-$as_echo "pty mode: $vim_cv_tty_mode, group: $vim_cv_tty_group" >&6; }
-      else
-	vim_cv_tty_group=world
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: ptys are world accessible" >&5
-$as_echo "ptys are world accessible" >&6; }
-      fi
-
-else
-
-      vim_cv_tty_group=world
-      { $as_echo "$as_me:${as_lineno-$LINENO}: result: can't determine - assume ptys are world accessible" >&5
-$as_echo "can't determine - assume ptys are world accessible" >&6; }
-
-fi
-rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
-  conftest.$ac_objext conftest.beam conftest.$ac_ext
-fi
-
-
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $vim_cv_tty_group" >&5
-$as_echo "$vim_cv_tty_group" >&6; }
-rm -f conftest_grp
-
-if test "x$vim_cv_tty_group" != "xworld" ; then
-  cat >>confdefs.h <<_ACEOF
-#define PTYGROUP $vim_cv_tty_group
-_ACEOF
-
-  if test "x$vim_cv_tty_mode" = "x" ; then
-    as_fn_error $? "It seems you're cross compiling and have 'vim_cv_tty_group' set, please also set the environment variable 'vim_cv_tty_mode' to the correct mode (probably 0620)" "$LINENO" 5
-  else
-    $as_echo "#define PTYMODE 0620" >>confdefs.h
-
-  fi
-fi
-
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking return type of signal handlers" >&5
 $as_echo_n "checking return type of signal handlers... " >&6; }