user_profile: Remove 'onboarding_steps' field.

Removes the 'onboarding_steps' field on 'UserProfile'
model which is no longer used.

It was introduced back in 2013 (b5e22bf), and is no
longer used.

Fixes part of #30043.

zerver/lib/create_user.py

@@ -2,7 +2,6 @@ from datetime import datetime
 from email.headerregistry import Address
 from typing import Optional, Union
 
-import orjson
 from django.contrib.auth.models import UserManager
 from django.utils.timezone import now as timezone_now
 
@@ -125,7 +124,6 @@ def create_user_profile(
         tos_version=tos_version,
         timezone=timezone,
         tutorial_status=tutorial_status,
-        onboarding_steps=orjson.dumps([]).decode(),
         default_language=default_language,
         delivery_email=email,
         email_address_visibility=email_address_visibility,

zerver/lib/onboarding_steps.py

@@ -69,8 +69,7 @@ def copy_onboarding_steps(source_profile: UserProfile, target_profile: UserProfi
             timestamp=onboarding_step.timestamp,
         )
 
-    # TODO: The 'tutorial_status' and 'onboarding_steps' fields
-    # of 'UserProfile' model are no longer used. Remove them.
+    # TODO: The 'tutorial_status' field of 'UserProfile' model
+    # is no longer used. Remove it.
     target_profile.tutorial_status = source_profile.tutorial_status
-    target_profile.onboarding_steps = source_profile.onboarding_steps
-    target_profile.save(update_fields=["tutorial_status", "onboarding_steps"])
+    target_profile.save(update_fields=["tutorial_status"])

zerver/migrations/0524_remove_userprofile_onboarding_steps.py

@@ -0,0 +1,16 @@
+# Generated by Django 5.0.6 on 2024-05-29 12:19
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("zerver", "0523_alter_multiuseinvite_subscribe_to_default_streams_and_more"),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name="userprofile",
+            name="onboarding_steps",
+        ),
+    ]

zerver/models/users.py

@@ -576,12 +576,6 @@ class UserProfile(AbstractBaseUser, PermissionsMixin, UserBaseSettings):
         default=TUTORIAL_WAITING, choices=TUTORIAL_STATES, max_length=1
     )
 
-    # Contains serialized JSON of the form:
-    #    [("step 1", true), ("step 2", false)]
-    # where the second element of each tuple is if the step has been
-    # completed.
-    onboarding_steps = models.TextField(default="[]")
-
     zoom_token = models.JSONField(default=None, null=True)
 
     objects = UserManager()