DB/Misc: Removed obsolete spell_groups

Removes some obsolete and wrong spell_groups.
Closes #2462, #1519 and #3968

sql/updates/world/2011_11_23_00_world_spell_group.sql

@@ -0,0 +1,7 @@
+-- Blessing of Sanctuary + Grace
+DELETE FROM `spell_group` WHERE `id`>=1091 AND `id`<=1093  LIMIT 4;
+DELETE FROM `spell_group_stack_rules` WHERE `group_id`=1093 LIMIT 1;
+
+-- Ebon Plague + Curse of Elements + Earth and Moon
+DELETE FROM `spell_group` WHERE `id`>=1040 AND `id`<=1043  LIMIT 6;
+DELETE FROM `spell_group_stack_rules` WHERE `group_id`=1043 LIMIT 1;