Remove ofBool, now that it is upstreamed to Std

Mathlib/Data/StdBitVec/Defs.lean

@@ -25,7 +25,6 @@ comment them out for now.
 
 ### Structural
 * `Std.BitVec.zeroExtendLE`: Zero extend a bitvector to a statically known larger size
-* `Std.BitVec.ofBool`: Turn a Boolean into a bitvector of length 1
 
 ### Comparisons
 * `Std.BitVec.sgt`: Signed greater-than comparison of bitvectors
@@ -95,11 +94,6 @@ namespace Std.BitVec
 def zeroExtendLE {w v : ℕ} (h : w ≤ v) (x : BitVec w) : BitVec v :=
   ⟨x.toFin.castLE <| pow_le_pow (by decide) h⟩
 
-/-- Turn a `Bool` into a bitvector of length `1` -/
-def ofBool : Bool → BitVec 1
-  | true  => 1
-  | false => 0
-
 /-!
 ## Comparisons
 -/