Add migration to drop unused colums

- the details are stored in the application json field

Author: glenpike

scripts/database/pg/migrations/030.do.remove-unused-dojolead-column.sql

@@ -0,0 +1,19 @@
+DO $$
+    BEGIN
+      BEGIN
+        ALTER TABLE cd_dojoleads DROP online_sessions;
+      EXCEPTION
+        WHEN others THEN RAISE NOTICE 'Unhandled error: % %', SQLERRM, SQLSTATE;
+      END;
+      BEGIN
+        ALTER TABLE cd_dojoleads DROP safeguarding_sponsor_name;
+      EXCEPTION
+        WHEN others THEN RAISE NOTICE 'Unhandled error: % %', SQLERRM, SQLSTATE;
+      END;
+      BEGIN
+        ALTER TABLE cd_dojoleads DROP safeguarding_sponsor_email;
+      EXCEPTION
+        WHEN others THEN RAISE NOTICE 'Unhandled error: % %', SQLERRM, SQLSTATE;
+      END;
+    END;
+$$