fix: remove plan_id from plan block

Author: zimeg

slack_sdk/models/blocks/blocks.py

@@ -849,7 +849,6 @@ class PlanBlock(Block):
     def attributes(self) -> Set[str]:  # type: ignore[override]
         return super().attributes.union(
             {
-                "plan_id",
                 "title",
                 "tasks",
             }
@@ -858,7 +857,6 @@ def attributes(self) -> Set[str]:  # type: ignore[override]
     def __init__(
         self,
         *,
-        plan_id: str,
         title: str,
         tasks: Optional[Sequence[Union[Dict, TaskCardBlock]]] = None,
         block_id: Optional[str] = None,
@@ -872,14 +870,11 @@ def __init__(
                 Maximum length for this field is 255 characters.
                 block_id should be unique for each message and each iteration of a message.
                 If a message is updated, use a new block_id.
-            plan_id (required): ID for the plan (May be removed / made optional, feel free to pass in a random UUID
-                for now)
             title (required): Title of the plan in plain text
             tasks: Details of the task in the form of a single "rich_text" entity.
         """
         super().__init__(type=self.type, block_id=block_id)
         show_unknown_key_warning(self, others)
 
-        self.plan_id = plan_id
         self.title = title
         self.tasks = tasks

tests/slack_sdk/models/test_blocks.py

@@ -901,7 +901,6 @@ class PlanBlockTests(unittest.TestCase):
     def test_document(self):
         input = {
             "type": "plan",
-            "plan_id": "plan_1",
             "title": "Thinking completed",
             "tasks": [
                 {