Remove reference to MemoryStorage

Author: webmaster128

src/pages/cw-multi-test/storage.mdx

@@ -3,7 +3,6 @@ tags: ["multitest", "storage"]
 ---
 
 [MockStorage]: https://docs.rs/cosmwasm-std/latest/cosmwasm_std/testing/struct.MockStorage.html
-[MemoryStorage]: https://docs.rs/cosmwasm-std/latest/cosmwasm_std/struct.MemoryStorage.html
 [Storage]: https://docs.rs/cosmwasm-std/latest/cosmwasm_std/trait.Storage.html
 [App]: https://docs.rs/cw-multi-test/latest/cw_multi_test/struct.App.html
 [get]: https://docs.rs/cosmwasm-std/latest/cosmwasm_std/trait.Storage.html#tymethod.get
@@ -69,8 +68,8 @@ storage by implementing the [Storage] trait. Only the `get{:rust}`, `set{:rust}`
 | [`range_keys{:rust}`][range_keys]     | Iterates over a set of **keys**, either forwards or backwards.            |
 | [`range_values{:rust}`][range_values] | Iterates over a set of **values**, either forwards or backwards.          |
 
-For inspiration on implementing custom storage, you can refer to [MemoryStorage] in the CosmWasm
-library. The following code stub could be a good starting point.
+For inspiration on implementing custom storage, you can refer to [`MockStorage{:rust}`][MockStorage]
+in the CosmWasm library. The following code stub could be a good starting point.
 
 ```rust showLineNumbers copy
 #[derive(Default)]