drop unneeded build deps

expat.spec

@@ -7,7 +7,6 @@ Source: http://downloads.sourceforge.net/expat/expat-%{version}.tar.bz2
 URL: http://www.libexpat.org/
 License: MIT
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
-BuildRequires: autoconf, automake, libtool, check-devel
 
 %description
 This is expat, the C library for parsing XML, written by James Clark. Expat
@@ -39,8 +38,6 @@ Install it if you need to link statically with expat.
 %setup -q
 
 %build
-rm -rf autom4te*.cache
-libtoolize --copy --force --automake && aclocal && autoheader && autoconf
 export CFLAGS="$RPM_OPT_FLAGS -fPIC"
 %configure
 make %{?_smp_mflags}