[migrations] Remove autotuned vm.kmem_size tunable

We don't need to additionally increase KVA size and should be fine with default value.
Purge previously set values.

Ticket: #73917

gui/services/migrations/0026_delete_vm_kmem_size_tunable.py

@@ -0,0 +1,22 @@
+from django.db import migrations
+
+
+def delete_vm_kmem_size(apps, schemaeditor):
+    tunables = apps.get_model('system', 'tunable')
+    kmem_size_tunable = tunables.objects.filter(tun_var='vm.kmem_size',
+                                                tun_comment='Generated by autotune')
+    kmem_size_tunable.delete()
+
+
+class Migration(migration.Migration):
+
+    dependencies = [
+        ('services', '0026_s3_fields'),
+    ]
+
+    operations = [
+        migrations.RunPython(
+            delete_vm_kmem_size
+        ),
+    ]
+