Remove educational challenge option

This feature was never properly defined, all this did was add a logo to the card.

Author: jmsmkn

app/grandchallenge/challenges/filters.py

@@ -30,7 +30,6 @@ class Meta(TitleDescriptionModalityStructureFilter.Meta):
             *TitleDescriptionModalityStructureFilter.Meta.fields,
             "series",
             "task_types",
-            "educational",
         )
         search_fields = (
             *TitleDescriptionModalityStructureFilter.Meta.search_fields,

app/grandchallenge/challenges/forms.py

@@ -31,7 +31,6 @@
     "series",
     "publications",
     "hidden",
-    "educational",
     "display_forum_link",
     "disclaimer",
     "contact_email",

app/grandchallenge/challenges/migrations/0058_alter_challenge_educational.py

@@ -0,0 +1,22 @@
+# Generated by Django 4.2.25 on 2025-10-09 12:39
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("challenges", "0057_remove_challenge_forum"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="challenge",
+            name="educational",
+            field=models.BooleanField(
+                default=False,
+                help_text="It is an educational challenge",
+                null=True,
+            ),
+        ),
+    ]

app/grandchallenge/challenges/models.py

@@ -286,8 +286,10 @@ class Challenge(ChallengeBase, FieldChangeMixin):
     is_active_until = models.DateField(
         help_text="The date at which the challenge becomes inactive",
     )
-    educational = models.BooleanField(
-        default=False, help_text="It is an educational challenge"
+    educational = deprecate_field(
+        models.BooleanField(
+            default=False, help_text="It is an educational challenge"
+        )
     )
     workshop_date = models.DateField(
         null=True,

app/grandchallenge/challenges/templates/challenges/challenge_card_body.html

@@ -25,13 +25,6 @@
         </a>
     {% endif %}
 
-    {% if challenge.educational %}
-        <span class="badge badge-dark above-stretched-link p-1 mt-1"
-              title="This is an educational challenge">
-                                            <i class="fas fa-university fa-fw"></i>
-                                            </span>
-    {% endif %}
-
     {% if challenge.cached_num_participants %}
         <span class="badge badge-dark above-stretched-link p-1 mt-1"
               title="{{ challenge.cached_num_participants }} participant{{ challenge.cached_num_participants|pluralize }}">