diff --git a/sisyphus/pbs_engine.py b/sisyphus/pbs_engine.py
index 88b3b7d..fd3ead9 100644
--- a/sisyphus/pbs_engine.py
+++ b/sisyphus/pbs_engine.py
@@ -1,5 +1,3 @@
-# Author: Jan-Thorsten Peter <peter@cs.rwth-aachen.de>
-
 from typing import Any
 import os
 import subprocess
@@ -143,44 +141,10 @@ def options(self, rqmt):
             mem = rqmt["mem"]
 
         l_out.append("mem=%s" % mem)
-
-        # if "rss" in rqmt:
-        #     try:
-        #         rss = "%igb" % math.ceil(float(rqmt["rss"]))
-        #     except ValueError:
-        #         rss = rqmt["rss"]
-        #     # rss = try_to_multiply(s['rss'], 1024*1024*1024) # convert to Gigabyte if possible
-        #     out.append("mem=%s" % rss)
-        # else:
-        #     out.append("mem=%s" % mem)
-
-        #try:
-        #    file_size = "%iG" % math.ceil(float(rqmt["file_size"]))
-        #except (ValueError, KeyError):
-        #    # If a different default value is wanted it can be overwritten by adding
-        #    # 'file_size' to the default_rqmt of this engine.
-        #    file_size = rqmt.get("file_size", "50G")
-
-        # out.append("-l")
-        # out.append("h_fsize=%s" % file_size)
-
         l_out.append("ngpus=%s" % rqmt.get("gpu", 0))
-
         l_out.append("ncpus=%s" % rqmt.get("cpu", 1))
-
         out.append("-lselect=1:%s" % ":".join(l_out))
 
-        # Try to convert time to float, calculate minutes from it
-        # and convert it back to an rounded string
-        # If it fails use string directly
-        #task_time = try_to_multiply(rqmt["time"], 60 * 60)  # convert to seconds if possible
-
-        #out.append("-l")
-        #out.append("h_rt=%s" % task_time)
-
-        #if rqmt.get("multi_node_slots", None):
-        #    out.extend(["-pe", self.pe_name, str(rqmt["multi_node_slots"])])
-
         qsub_args = rqmt.get("qsub_args", [])
         if isinstance(qsub_args, str):
             qsub_args = qsub_args.split()
@@ -300,7 +264,7 @@ def queue_state(self):
                     continue
                 state = job["job_state"]
                 name = job["Job_Name"]
-                task = 1 # TODO
+                task = 1  # TODO
                 task_infos[(name, task)].append((job_id, state))
             except Exception:
                 logging.warning("Failed to parse squeue output: %s" % str(job))
@@ -308,7 +272,7 @@ def queue_state(self):
         self._task_info_cache = task_infos
         self._task_info_cache_last_update = time.time()
         return task_infos
-    
+
     def output_path(self):
         """Return s list with all currently running tasks in this queue"""
 
@@ -329,7 +293,7 @@ def output_path(self):
 
         import json
         job_dict = json.loads(b"\n".join(out))
-        job_id =  os.getenv("PBS_JOBID")
+        job_id = os.getenv("PBS_JOBID")
         job = job_dict["Jobs"][job_id]
         return job["Output_Path"].split(":")[-1]
 
@@ -345,8 +309,6 @@ def task_state(self, task, task_id):
         name = escape_name(name)
         task_name = (name, task_id)
         queue_state = self.queue_state()
-        #print("search for %s" % str(task_name))
-        #print("queue state: %s" % str(queue_state))
         qs = queue_state[task_name]
 
         # task name should be uniq
@@ -400,7 +362,7 @@ def init_worker(self, task):
             os.unlink(logpath)
 
         engine_logpath = self.output_path()
-        
+
         try:
             if os.path.isfile(engine_logpath):
                 os.link(engine_logpath, logpath)