style: remove unused variable assignments from tests

These assignments caused style warnings (flake8).

tests/test_engine_executor.py

@@ -42,7 +42,7 @@ class TestEngineExecutor(unittest.TestCase):
             global_state[0] = param
 
         # Before the executor is done there should be the initial value
-        e = EngineExecutor("RANDOM_NAMESPACE", None, due_time, f, "hello world")
+        EngineExecutor("RANDOM_NAMESPACE", None, due_time, f, "hello world")
         self.assertEqual("none", global_state[0])
         self.assertNotEqual("hello world", global_state[0])
 
@@ -60,17 +60,13 @@ class TestEngineExecutor(unittest.TestCase):
 
         # Before the executor 1 is done there should be the initial value
         due_time1 = SU.timestamp() + 1
-        e1 = EngineExecutor(
-            "EXECUTOR_1", None, due_time1, f, "hello world from executor 1"
-        )
+        EngineExecutor("EXECUTOR_1", None, due_time1, f, "hello world from executor 1")
         self.assertEqual("none", global_state[0])
         self.assertNotEqual("hello world from executor 1", global_state[0])
 
         # Before the executor 2 is done there should be still the initial value
         due_time2 = SU.timestamp() + 0.5
-        e2 = EngineExecutor(
-            "EXECUTOR_2", None, due_time2, f, "hello world from executor 2"
-        )
+        EngineExecutor("EXECUTOR_2", None, due_time2, f, "hello world from executor 2")
         self.assertEqual("none", global_state[0])
         self.assertNotEqual("hello world from executor 2", global_state[0])
 
@@ -103,9 +99,7 @@ class TestEngineExecutor(unittest.TestCase):
 
         # Before the the child is done there should be the initial value
         due_time2 = SU.timestamp() + 1
-        child = EngineExecutor(
-            "EXECUTOR_CHILD", parent, due_time2, f, "hello world from child"
-        )
+        EngineExecutor("EXECUTOR_CHILD", parent, due_time2, f, "hello world from child")
         self.assertEqual("none", global_state[0])
 
         # After 0.3 seconds there still should be the initial value
@@ -139,9 +133,7 @@ class TestEngineExecutor(unittest.TestCase):
 
         # Before the the child is done there should be the initial value
         due_time2 = SU.timestamp() + 1.5
-        child = EngineExecutor(
-            "EXECUTOR_CHILD", parent, due_time2, f, "hello world from child"
-        )
+        EngineExecutor("EXECUTOR_CHILD", parent, due_time2, f, "hello world from child")
         self.assertEqual("none", global_state[0])
 
         # After 0.2 seconds there still should be the initial value
@@ -192,9 +184,7 @@ class TestEngineExecutor(unittest.TestCase):
 
         # Before the the child is done there should be the initial value
         due_time2 = SU.timestamp() + 1.5
-        child = EngineExecutor(
-            "EXECUTOR_CHILD", parent, due_time2, f, "hello world from child"
-        )
+        EngineExecutor("EXECUTOR_CHILD", parent, due_time2, f, "hello world from child")
         self.assertEqual("none", global_state[0])
 
         # There should be a total of 2 timers
@@ -208,7 +198,7 @@ class TestEngineExecutor(unittest.TestCase):
         self.assertEqual("none", global_state[0])
 
         # Before the the child is done there should be the initial value
-        child = EngineExecutor(
+        EngineExecutor(
             "EXECUTOR_CHILD", parent, due_time2, f, "hello world from alternative child"
         )
         self.assertEqual("none", global_state[0])