remove shirt from camps

queries/202104_camp_updates.sql

@@ -0,0 +1,4 @@
+ALTER TABLE badminton_coach.camp_kid DROP FOREIGN KEY fk_camp_kid_1`;`
+ALTER TABLE `camp_kid` DROP INDEX `fk_camp_kid_1_idx`;
+ALTER TABLE `camp_kid` DROP `ck_shirt_size_id`;
+