Remove size_hint::pow_scalar_base

src/size_hint.rs

@@ -3,7 +3,6 @@
 
 use std::usize;
 use std::cmp;
-use std::u32;
 
 /// `SizeHint` is the return type of `Iterator::size_hint()`.
 pub type SizeHint = (usize, Option<usize>);
@@ -75,21 +74,6 @@ pub fn mul_scalar(sh: SizeHint, x: usize) -> SizeHint {
     (low, hi)
 }
 
-/// Raise `base` correctly by a `SizeHint` exponent.
-#[inline]
-#[allow(dead_code)]
-pub fn pow_scalar_base(base: usize, exp: SizeHint) -> SizeHint {
-    let exp_low = cmp::min(exp.0, u32::MAX as usize) as u32;
-    let low = base.saturating_pow(exp_low);
-
-    let hi = exp.1.and_then(|exp| {
-        let exp_hi = cmp::min(exp, u32::MAX as usize) as u32;
-        base.checked_pow(exp_hi)
-    });
-
-    (low, hi)
-}
-
 /// Return the maximum
 #[inline]
 pub fn max(a: SizeHint, b: SizeHint) -> SizeHint {