chore: remove some Nat shortcut instances

Author: kim-em

Mathlib/Data/Nat/Basic.lean

@@ -39,13 +39,6 @@ instance instLinearOrder : LinearOrder ℕ where
   toDecidableLE := inferInstance
   toDecidableEq := inferInstance
 
--- Shortcut instances
-instance : Preorder ℕ := inferInstance
-instance : PartialOrder ℕ := inferInstance
-instance : Min ℕ := inferInstance
-instance : Max ℕ := inferInstance
-instance : Ord ℕ := inferInstance
-
 instance instNontrivial : Nontrivial ℕ := ⟨⟨0, 1, Nat.zero_ne_one⟩⟩
 
 attribute [gcongr] Nat.succ_le_succ Nat.div_le_div_right Nat.div_le_div_left Nat.div_le_div