Remove unnecessary imports

Author: cmichi

crates/storage/src/collections/stash/mod.rs

@@ -33,9 +33,6 @@ use crate::{
 };
 use ink_primitives::Key;
 
-#[cfg(doc)]
-use crate::traits::SpreadLayout;
-
 /// An index into the stash.
 type Index = u32;
 

crates/storage/src/lazy/lazy_hmap.rs

@@ -54,9 +54,6 @@ use ink_prelude::{
 };
 use ink_primitives::Key;
 
-#[cfg(doc)]
-use crate::lazy::LazyIndexMap;
-
 /// The map for the contract storage entries.
 ///
 /// # Note