Revert "Fix handling some None parameters in kubernetes 23 libs. (#21905

)"

This reverts commit 24c84f0.

airflow/kubernetes/pod_generator_deprecated.py

@@ -206,8 +206,7 @@ def __init__(
 
         self.container.command = cmds or []
         self.container.args = args or []
-        if image_pull_policy:
-            self.container.image_pull_policy = image_pull_policy
+        self.container.image_pull_policy = image_pull_policy
         self.container.ports = ports or []
         self.container.resources = resources
         self.container.volume_mounts = volume_mounts or []
@@ -216,17 +215,15 @@ def __init__(
         self.spec = k8s.V1PodSpec(containers=[])
         self.spec.security_context = security_context
         self.spec.tolerations = tolerations
-        if dnspolicy:
-            self.spec.dns_policy = dnspolicy
+        self.spec.dns_policy = dnspolicy
         self.spec.scheduler_name = schedulername
         self.spec.host_network = hostnetwork
         self.spec.affinity = affinity
         self.spec.service_account_name = service_account_name
         self.spec.init_containers = init_containers
         self.spec.volumes = volumes or []
         self.spec.node_selector = node_selectors
-        if restart_policy:
-            self.spec.restart_policy = restart_policy
+        self.spec.restart_policy = restart_policy
         self.spec.priority_class_name = priority_class_name
 
         self.spec.image_pull_secrets = []