Remove cluster Python venv stuff (not appropriate in cluster layer)

vtds_cluster_kvm/private/cluster.py

@@ -507,14 +507,3 @@ def get_virtual_nodes(self):
 
     def get_virtual_networks(self):
         return VirtualNetworks(self.common)
-
-    def get_node_venv_path(self):
-        python_config = self.config.get('python', {})
-        return python_config.get('node_venv_path', "/root/node-venv")
-
-    def get_node_python_executable(self):
-        # NOTE: do not use path_join() here to construct the path. The
-        # path here is being constructed for a Linux environment,
-        # where path separators are always '/' and which might not
-        # match the system this code is running on.
-        return "%s/bin/python3" % self.get_node_venv_path()

vtds_cluster_kvm/private/config/config.yaml

@@ -1,24 +1,4 @@
 cluster:
-  # The python information here pertains to a shared Python Virtual
-  # Environment created by the Cluster layer for use of it and any
-  # higher layers (application layers) that might need it. Specifically,
-  # this allows the path to the virtual environment to be specified and
-  # it allows for the specification of Python modules to be
-  # pre-installed by the Cluster layer in that virtual environment for
-  # use by other layers.
-  python:
-    node_venv_path: /root/blade-venv
-    modules:
-    modules:
-      example:
-        # Install 
-        module_name: pyyaml
-        delete: true # this is an example, so don't really install it
-        source_type: pypi
-        metadata:
-          url: null
-          version: pyyaml~=6.0
-
   # The 'host_blade_network' specifies the parameters for a
   # blade-local network used only among Virtual Nodes that share a
   # single blade and the blade itself. The addresses here are