diff --git a/crates/storage/src/structured_storage.rs b/crates/storage/src/structured_storage.rs
index b153d357f5c..507cd1f26d0 100644
--- a/crates/storage/src/structured_storage.rs
+++ b/crates/storage/src/structured_storage.rs
@@ -406,17 +406,13 @@ pub mod test {
     use crate as fuel_core_storage;
     use crate::kv_store::{
         KeyValueInspect,
-        KeyValueMutate,
         StorageColumn,
     };
     use fuel_core_storage::{
         kv_store::Value,
         Result as StorageResult,
     };
-    use std::{
-        collections::HashMap,
-        sync::Arc,
-    };
+    use std::collections::HashMap;
 
     type Storage = HashMap<(u32, Vec<u8>), Value>;
 
@@ -454,27 +450,4 @@ pub mod test {
             Ok(value)
         }
     }
-
-    impl<Column> KeyValueMutate for InMemoryStorage<Column>
-    where
-        InMemoryStorage<Column>: KeyValueInspect,
-    {
-        #[doc = " Writes the `buf` into the storage and returns the number of written bytes."]
-        fn write(
-            &mut self,
-            key: &[u8],
-            column: Self::Column,
-            buf: &[u8],
-        ) -> StorageResult<usize> {
-            self.storage
-                .insert((column.id(), key.to_vec()), Arc::new(buf.to_vec()));
-            Ok(buf.len())
-        }
-
-        #[doc = " Removes the value from the storage."]
-        fn delete(&mut self, key: &[u8], column: Self::Column) -> StorageResult<()> {
-            self.storage.remove(&(column.id(), key.to_vec()));
-            Ok(())
-        }
-    }
 }