Remove configure probe for sys/tas.h.

The last reference to HAVE_SYS_TAS_H disappeared with commit 718aa43a.

configure

@@ -13875,7 +13875,7 @@ $as_echo "#define HAVE_STDBOOL_H 1" >>confdefs.h
 fi
 
 
-for ac_header in atomic.h copyfile.h execinfo.h getopt.h ifaddrs.h langinfo.h mbarrier.h poll.h sys/epoll.h sys/event.h sys/ipc.h sys/personality.h sys/prctl.h sys/procctl.h sys/resource.h sys/select.h sys/sem.h sys/shm.h sys/signalfd.h sys/sockio.h sys/tas.h sys/uio.h sys/un.h termios.h ucred.h wctype.h
+for ac_header in atomic.h copyfile.h execinfo.h getopt.h ifaddrs.h langinfo.h mbarrier.h poll.h sys/epoll.h sys/event.h sys/ipc.h sys/personality.h sys/prctl.h sys/procctl.h sys/resource.h sys/select.h sys/sem.h sys/shm.h sys/signalfd.h sys/sockio.h sys/uio.h sys/un.h termios.h ucred.h wctype.h
 do :
   as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
 ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"

configure.ac

@@ -1465,7 +1465,6 @@ AC_CHECK_HEADERS(m4_normalize([
 	sys/shm.h
 	sys/signalfd.h
 	sys/sockio.h
-	sys/tas.h
 	sys/uio.h
 	sys/un.h
 	termios.h

src/include/pg_config.h.in

@@ -640,9 +640,6 @@
 /* Define to 1 if you have the <sys/stat.h> header file. */
 #undef HAVE_SYS_STAT_H
 
-/* Define to 1 if you have the <sys/tas.h> header file. */
-#undef HAVE_SYS_TAS_H
-
 /* Define to 1 if you have the <sys/types.h> header file. */
 #undef HAVE_SYS_TYPES_H
 

src/tools/msvc/Solution.pm

@@ -406,7 +406,6 @@ sub GenerateFiles
 		HAVE_SYS_SIGNALFD_H                      => undef,
 		HAVE_SYS_SOCKIO_H                        => undef,
 		HAVE_SYS_STAT_H                          => 1,
-		HAVE_SYS_TAS_H                           => undef,
 		HAVE_SYS_TYPES_H                         => 1,
 		HAVE_SYS_UCRED_H                         => undef,
 		HAVE_SYS_UIO_H                           => undef,