Docs: update Job.nodelist description

reframe/core/schedulers/__init__.py

@@ -514,8 +514,7 @@ def nodelist(self):
 
         This attribute is :class:`None` if no nodes are assigned to the job
         yet.
-        This attribute is set reliably only for the ``slurm`` backend, i.e.,
-        Slurm *with* accounting enabled.
+
         The ``squeue`` scheduler backend, i.e., Slurm *without* accounting,
         might not set this attribute for jobs that finish very quickly.
         For the ``local`` scheduler backend, this returns an one-element list
@@ -526,8 +525,6 @@ def nodelist(self):
         For more information on flexible node allocation, see the
         :option:`--flex-alloc-nodes` command-line option.
 
-        This attribute is *not* supported by the ``pbs`` scheduler backend.
-
         .. versionadded:: 2.17
 
         :type: :class:`List[str]` or :class:`None`