Revert "[0569] Add COLUMN PlayerSkinReflootId to fix db build"

ERROR 1060 (42S21) at line 3: Duplicate column name 'PlayerSkinReflootId'
ERROR 1054 (42S22) at line 51: Unknown column 'PlayerSkinReflootId' in 'field list'
ERROR 1054 (42S22) at line 17: Unknown column 'required_s2453_01_mangos_eai_dbguid_support' in 'db_version'

This reverts commit 6fe973e.

Updates/0569_CDB-4051_battleground_skin_loot.sql

@@ -14,7 +14,7 @@
 -- (3028,-1,3020,3022,0,0,0,'');
 
 -- https://github.com/cmangos/classic-db/commit/b918b3917d1dd1f277d4d3a4b585cecba739a789#diff-e92a3796e94e2cac58fa48ab09514b0ff014d0e98a2e1621812196867adcbbbaR4
-ALTER TABLE battleground_template ADD COLUMN PlayerSkinReflootId MEDIUMINT UNSIGNED NOT NULL DEFAULT 0 COMMENT 'reference_loot_template entry';
+ALTER TABLE battleground_template ADD COLUMN IF NOT EXISTS PlayerSkinReflootId MEDIUMINT(8) UNSIGNED NOT NULL DEFAULT 0 COMMENT 'reference_loot_template entry';
 
 INSERT INTO reference_loot_template(entry, item, ChanceOrQuestChance, groupid, mincountOrRef, maxcount, condition_id, comments) VALUES
 -- ('1', '17502', '75', '0', '1', '1', '3023', ''),