obs/slapos: remove unneeded slapos.buidlout.cfg.in

This is a fixup of becf8150

obs/slapos/slapos-node/slapos/slapos.buildout.cfg.in

-[buildout]
-rootdir = %TARGET_DIRECTORY%
-destdir = %BUILD_ROOT_DIRECTORY%
-builddir = %BUILD_DIRECTORY%
-extensions =
-extends-cache = extends-cache
-download-cache = download-cache
-parts =
-  zc.buildout
-
-# Add location for modified non-official slapos.buildout
-find-links +=
-  http://www.nexedi.org/static/packages/source/
-  http://www.nexedi.org/static/packages/source/slapos.buildout/
-
-[zc.buildout]
-recipe = zc.recipe.egg
-eggs =
-  zc.buildout
-
-[versions]
-# The last version of setuptools compatible with Python 3.7
-setuptools = 67.8.0
-# Use SlapOS patched zc.buildout
-zc.buildout = 3.0.1+slapos002
-pip = 23.2.1
-# Use SlapOS patched zc.recipe.egg (zc.recipe.egg 2.x is for Buildout 2)
-zc.recipe.egg = 2.0.8.dev0+slapos002
-wheel = 0.41.2