Remove the temporary autoreconf magic

As the comments say, it was only needed for patch1. While at this, also
drop the ChangeLog file which isn't generated by upstream any more.

clutter.spec

@@ -25,7 +25,6 @@ BuildRequires: libXcomposite-devel
 BuildRequires: libXdamage-devel
 BuildRequires: libXi-devel
 BuildRequires: libevdev-devel
-# Temporary for autoreconf
 BuildRequires: gettext-devel
 Requires:      gobject-introspection
 %if %{with_wayland}
@@ -84,11 +83,7 @@ This package contains documentation for clutter.
 %setup -q
 
 %build
-# needed for patch1, autogen.sh is not enough due to divergent autoconf
-# versions at present - adamw 2013/12
-autoreconf -i
-(if ! test -x configure; then NOCONFIGURE=1 ./autogen.sh; CONFIGFLAGS=--enable-gtk-doc; fi;
- %configure $CONFIGFLAGS \
+%configure \
 	--enable-xinput \
         --enable-gdk-backend \
 %if %{with_wayland}
@@ -97,12 +92,6 @@ autoreconf -i
         --enable-wayland-backend \
         --enable-wayland-compositor \
 %endif
- # clutter git ships with some magic to put the git log in shipped tarballs
- # which gets listed in files; don't blow up if it's missing
- if ! test -f ChangeLog; then
-   echo "Created from snapshot" > ChangeLog
- fi
-)
 
 make %{?_smp_mflags} V=1
 
@@ -125,7 +114,6 @@ find %{buildroot} -name '*.la' -exec rm -f {} ';'
 %{_libdir}/girepository-1.0/*.typelib
 
 %files devel
-%doc ChangeLog
 %{_includedir}/*
 %{_libdir}/*.so
 %{_libdir}/pkgconfig/*.pc