Remove Measurable struct

Signed-off-by: Nico Burns <[email protected]>

malloc_size_of/src/lib.rs

@@ -183,22 +183,3 @@ impl MallocSizeOfOps {
         have_seen_ptr_op(ptr as *const c_void)
     }
 }
-
-/// Measurable that defers to inner value and used to verify MallocSizeOf implementation in a
-/// struct.
-#[derive(Clone)]
-pub struct Measurable<T: MallocSizeOf>(pub T);
-
-impl<T: MallocSizeOf> Deref for Measurable<T> {
-    type Target = T;
-
-    fn deref(&self) -> &T {
-        &self.0
-    }
-}
-
-impl<T: MallocSizeOf> DerefMut for Measurable<T> {
-    fn deref_mut(&mut self) -> &mut T {
-        &mut self.0
-    }
-}