fix ruff issues

Author: josemmoya

python/rxnet/runtime.py

@@ -436,7 +436,6 @@ def tick_nodes_at(
 
         entries = [self._entries[i] for i in node_indices]
         self.context.activation_us = activation_us
-        nodes = [e.node for e in entries]
         if self._executor is not None:
             elapsed = self._parallel_tick(entries)
         else:

python/rxnet/thread.py

@@ -14,10 +14,10 @@
 
 from .cyclic import sleep_until
 from .runtime import (
-    Context,
     SCHED_ERROR,
     SCHED_SCHEDULABLE,
     SCHED_UNSCHEDULABLE,
+    Context,
     SchedReport,
     SchedResourceAccess,
     SchedTaskResult,

python/tests/test_multirate.py

@@ -11,8 +11,8 @@
 """
 from __future__ import annotations
 
-import sys
 import io
+import sys
 import threading
 import time
 from contextlib import contextmanager