Review: remove unneeded cfgs

src/seq/index.rs

@@ -239,9 +239,6 @@ where
         panic!("`amount` of samples must be less than or equal to `length`");
     }
     if length > (u32::MAX as usize) {
-        #[cfg(target_pointer_width = "32")]
-        unreachable!();
-
         // We never want to use inplace here, but could use floyd's alg
         // Lazy version: always use the cache alg.
         #[cfg(target_pointer_width = "64")]
@@ -303,15 +300,8 @@ where
     X: Into<f64>,
 {
     if length > (u32::MAX as usize) {
-        #[cfg(target_pointer_width = "32")]
-        unreachable!();
-
         #[cfg(target_pointer_width = "64")]
-        {
-            let amount = amount as u64;
-            let length = length as u64;
-            sample_efraimidis_spirakis(rng, length, weight, amount)
-        }
+        sample_efraimidis_spirakis(rng, length as u64, weight, amount as u64)
     } else {
         assert!(amount <= u32::MAX as usize);
         let amount = amount as u32;