Remove deprecated Import model (#34371)

db/migrate/20250410144908_drop_imports.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+class DropImports < ActiveRecord::Migration[7.1]
+  def up
+    drop_table :imports
+  end
+
+  def down
+    raise ActiveRecord::IrreversibleMigration
+  end
+end