[brubru] cleanup configure.ac. see #4770

configure.ac

@@ -174,18 +174,11 @@ AM_CHECK_PYTHON_HEADERS(,[AC_MSG_ERROR(could not find Python headers)])
 AC_SUBST([PYTHON_INCLUDES])
 
 AS_AC_EXPAND(DATADIR, "${datadir}")
-
-AS_AC_EXPAND(LIBDIR, ${libdir})
-
+AS_AC_EXPAND(LIBDIR, "${libdir}")
 AS_AC_EXPAND(DOCDIR, "${docdir}")
 
 AC_SUBST(VERSION)
 AC_SUBST(PACKAGE)
-AC_SUBST(DATADIR)
-AC_SUBST(LIBDIR)
-AS_AC_EXPAND(DATADIR, "${DATADIR}")
-AC_SUBST(DOCDIR)
-AS_AC_EXPAND(DOCDIR, "${DOCDIR}")
 
 AC_CONFIG_FILES([ 
 	Makefile