maint: remove unnecessary file

* src/configure.in: Remove.  This file has been obsolete for a while.

src/configure.in

@@ -1,57 +0,0 @@
-dnl Process this file with autoconf to produce a configure script.
-AC_INIT(tar.h)
-PROGS="tar"
-AC_SUBST(PROGS)dnl
-AC_PROG_CC
-AC_PROG_CPP
-AC_GCC_TRADITIONAL
-AC_PROG_INSTALL
-AC_PROG_YACC
-AC_AIX
-AC_MINIX
-AC_ISC_POSIX
-AC_CONST
-AC_RETSIGTYPE
-AC_SIZE_T
-AC_MAJOR_HEADER
-AC_DIR_HEADER
-# The 3-argument open happens to go along with the O_* defines,
-# which are easier to check for.
-AC_HEADER_CHECK(fcntl.h, open_header=fcntl.h, open_header=sys/file.h)
-AC_COMPILE_CHECK(3-argument open,
-[#include <$open_header>], [int x = O_RDONLY;], , AC_DEFINE(EMUL_OPEN3))
-AC_REMOTE_TAPE
-AC_RSH
-AC_STDC_HEADERS
-AC_UNISTD_H
-echo checking for getgrgid declaration
-AC_HEADER_EGREP(getgrgid, grp.h, AC_DEFINE(HAVE_GETGRGID))
-echo checking for getpwuid declaration
-AC_HEADER_EGREP(getpwuid, pwd.h, AC_DEFINE(HAVE_GETPWUID))
-AC_HAVE_HEADERS(string.h limits.h)
-echo checking default archive
-# This might guess wrong, but it's not very important.
-for dev in rmt8 rmt0 rmt0h rct0 rst0 tape rct/c7d0s2
-do
-  if test -n "`ls /dev/$dev 2>/dev/null`"; then
-    DEF_AR_FILE=/dev/$dev
-    break
-  fi
-done
-if test -z "$DEF_AR_FILE"; then
-  DEF_AR_FILE=-
-fi
-
-AC_SUBST(DEF_AR_FILE)dnl
-AC_HAVE_FUNCS(strstr valloc mkdir mknod rename ftruncate ftime getcwd)
-AC_VPRINTF
-AC_ALLOCA
-echo checking for BSD
-( test -f /vmunix || test -f /sdmach || test -f /../../mach ) && AC_DEFINE(BSD42)
-echo checking for HP-UX
-test "`(uname -s) 2> /dev/null`" = 'HP-UX' && MALLOC=malloc.o
-AC_SUBST(MALLOC)
-AC_XENIX_DIR
-AC_HAVE_LIBRARY(socket, [LIBS="$LIBS -lsocket"])
-AC_HAVE_LIBRARY(nsl, [LIBS="$LIBS -lnsl"])
-AC_OUTPUT(Makefile)