slapos-master: Clean up recipe and remove duplications.

software/slapos-master/software.cfg

 [buildout]
 extends =
-  ../../stack/erp5/buildout.cfg
+  ../../software/erp5/sofware.cfg
 
 parts +=
   vifib-fix-products-paths
@@ -10,28 +10,16 @@ parts +=
 # Used to generate bt5lists.
 list = ${erp5:location}/bt5 ${erp5:location}/product/ERP5/bootstrap ${vifib:location}/master/bt5
 
-[genbt5list]
-recipe = plone.recipe.command
-stop-on-error = true
-genbt5list = ${erp5:location}/product/ERP5/bin/genbt5list
-command =
-  ${buildout:executable} ${:genbt5list} ${local-bt5-repository:list}
-update-command = ${:command}
-
 [erp5_repository_list]
 repository_id_list = erp5 vifib/master
 
 [erp5]
-recipe = slapos.recipe.build:gitclone
-repository = https://lab.nexedi.com/nexedi/erp5.git
 branch = erp5-vifib
-git-executable = ${git:location}/bin/git
 
 [vifib]
-recipe = slapos.recipe.build:gitclone
+<= erp5
 repository = https://lab.nexedi.com/nexedi/slapos.core.git
 branch = master
-git-executable = ${git:location}/bin/git
 
 [vifib-fix-products-paths]
 recipe = plone.recipe.command