Scripts/Spells: Removed unused rogue spell scriptss (#26157)

sql/updates/world/master/2021_02_27_02_world_rogue_spells_remove_unused.sql

@@ -0,0 +1,8 @@
+-- Remove old unused spell scripts
+DELETE FROM `spell_script_names` WHERE `ScriptName` IN 
+('spell_rog_cheat_death',
+'spell_rog_crippling_poison',
+'spell_rog_master_of_subtlety',
+'spell_rog_preparation',
+'spell_rog_shiv',
+'spell_rog_serrated_blades');