dahdi: The driver has moved to libosmo-abis
We can remove this check from openbsc as the handling is done
in libosmo-abis.
diff --git a/openbsc/configure.ac b/openbsc/configure.ac
index 0d6a1da..24dbc30 100644
--- a/openbsc/configure.ac
+++ b/openbsc/configure.ac
@@ -92,7 +92,6 @@
dnl checks for header files
AC_HEADER_STDC
-AC_CHECK_HEADERS(dahdi/user.h,,AC_MSG_WARN(DAHDI input driver will not be built))
AC_CHECK_HEADERS(dbi/dbd.h,,AC_MSG_ERROR(DBI library is not installed))
AC_CHECK_HEADERS(pcap/pcap.h,,AC_MSG_ERROR(PCAP library is not installed))