tag @a remove highest_damage_dealt
tag @a remove highest_damage_taken
tag @a remove highest_damage_blocked
tag @a remove highest_mobs_killed
tag @a remove highest_projectiles_shot
tag @a remove damage_dealt_checked
tag @a remove damage_taken_checked
tag @a remove damage_blocked_checked
tag @a remove mobs_killed_checked
tag @a remove projectiles_shot_checked

scoreboard objectives remove stats_player_damage_dealt
scoreboard objectives remove stats_player_damage_taken
scoreboard objectives remove stats_player_damage_blocked
scoreboard objectives remove stats_player_mobs_killed
scoreboard objectives remove stats_player_projectiles_fired_bow
scoreboard objectives remove stats_player_projectiles_fired_crossbow