Delete old specfile sections to improve build success on Leap 15.X

sssd.spec

@@ -89,6 +89,7 @@ BuildRequires:  pkgconfig(p11-kit-1) >= 0.23.3
 BuildRequires:  pkgconfig(popt)
 BuildRequires:  pkgconfig(python3)
 BuildRequires:  pkgconfig(smbclient)
+BuildRequires:  pkgconfig(systemd)
 BuildRequires:  pkgconfig(talloc)
 BuildRequires:  pkgconfig(tdb) >= 1.1.3
 BuildRequires:  pkgconfig(tevent)
@@ -439,8 +440,7 @@ autoreconf -fiv
 	--with-subid
 %else
 	--with-selinux=no \
-	--with-libsifp \
-	--with-files-provider
+	--with-libsifp
 %endif
 %make_build all
 
@@ -696,9 +696,6 @@ fi
 %_libdir/%name/libsss_cert*
 %_libdir/%name/libsss_crypt*
 %_libdir/%name/libsss_debug*
-%if 0%{?suse_version} < 1600
-%_libdir/%name/libsss_files*
-%endif
 %_libdir/%name/libsss_iface*
 %_libdir/%name/libsss_sbus*
 %_libdir/%name/libsss_simple*
@@ -931,16 +928,6 @@ fi
 %_libdir/libsss_nss_idmap.so
 %_libdir/pkgconfig/sss_nss_idmap.pc
 
-%if 0%{?suse_version} < 1600
-%files -n libsss_simpleifp0
-%_libdir/libsss_simpleifp.so.0*
-
-%files -n libsss_simpleifp-devel
-%_includedir/sss_sifp*.h
-%_libdir/libsss_simpleifp.so
-%_libdir/pkgconfig/sss_simpleifp.pc
-%endif
-
 %files -n python3-ipa_hbac
 %dir %python3_sitearch
 %python3_sitearch/pyhbac.so