Refactor.

src/unsafe.rs

@@ -42,16 +42,6 @@ pub fn unsafe_cast_box<X: Variant, T: Variant>(item: Box<X>) -> Result<Box<T>, B
     }
 }
 
-/// # DANGEROUS!!!
-///
-/// A dangerous function that blindly casts a reference from one lifetime to another lifetime.
-///
-/// Force-casting a a reference to another lifetime saves on allocations and string cloning,
-/// but must be used with the utmost care.
-pub fn unsafe_mut_cast_to_lifetime<'a, T>(value: &mut T) -> &'a mut T {
-    unsafe { mem::transmute::<_, &'a mut T>(value) }
-}
-
 /// # DANGEROUS!!!
 ///
 /// A dangerous function that blindly casts a `&str` from one lifetime to a `Cow<str>` of