chore: bump std4 (#2946)

We bump std4 and take care to delete the now-upstreamed (leanprover-community/batteries#107) instances mentioned in #2878.

Mathlib/Data/Nat/Cast/Defs.lean

@@ -39,15 +39,6 @@ protected def Nat.unaryCast {R : Type u} [One R] [Zero R] [Add R] : ℕ → R
 
 #align nat.cast Nat.cast
 
--- see note [coercion into rings]
-instance [NatCast R] : CoeTail ℕ R where coe := Nat.cast
-
--- see note [coercion into rings]
-instance [NatCast R] : CoeHTCT ℕ R where coe := Nat.cast
-
-/-- This instance is needed to ensure that `instCoeNatInt` is not used. -/
-instance : Coe ℕ ℤ where coe := Nat.cast
-
 -- the following four declarations are not in mathlib3 and are relevant to the way numeric
 -- literals are handled in Lean 4.
 

lake-manifest.json

@@ -16,6 +16,6 @@
   {"git":
    {"url": "https://github.com/leanprover/std4",
     "subDir?": null,
-    "rev": "44a92d84c31a88b9af9329a441890ad449d8cd5f",
+    "rev": "d4107bc2bd28bc70e8327578c16acb904d2bcfd0",
     "name": "std",
     "inputRev?": "main"}}]}