Pick the newest buildout and drop workaround.

slapos.libnetworkcache does not depend anymore on M2Crypto (it uses openssl
binary internally and it is optional).

1.5.3-dev-SlapOS-009 version of zc.buildout is safe to be used with new,
stabilised API to library.

stack/erp5.cfg

@@ -412,13 +412,7 @@ scripts =
 
 [versions]
 # Use SlapOS patched zc.buildout
-zc.buildout = 1.5.3-dev-SlapOS-005
-
-# XXX: Very dirty workaround
-# XXX: Pin slapos.libnetworkcache, as version higher than 0.3 depends on
-# XXX: M2Crypto which installation is not defined yet
-# XXX: Note, that slapos.libnetworkcache is buildout "internal" dependency
-slapos.libnetworkcache = 0.3
+zc.buildout = 1.5.3-dev-SlapOS-009
 
 # pin Acquisition and Products.DCWorkflow to Nexedi flavour of eggs
 Acquisition = 2.13.7nxd001