data remove storage mob_heads:image data
data remove storage mob_heads:root data

scoreboard objectives remove mob_heads.config
scoreboard objectives remove mob_heads.image
scoreboard objectives remove mob_heads.check
scoreboard objectives remove mob_heads.drop_notification
scoreboard objectives remove mob_heads.random
scoreboard objectives remove mob_heads.rarity
scoreboard objectives remove mob_heads.killed.mob
scoreboard objectives remove mob_heads.head_dropped.mob
scoreboard objectives remove mob_heads.drop_rates
scoreboard objectives remove mob_heads.mined_creaking_heart
scoreboard objectives remove get_mob_head

say Successfully uninstalled Mob Heads!