chore: remove stale todo's

docs/docs/dev_docs/contracts/syntax/storage.md

@@ -194,12 +194,8 @@ In contrast to public state, private state is persistent state that is **not** v
 
 The value of a private state variable can either be shared via an [encrypted log](./events.md#encrypted-events), or offchain via web2, or completely offline: it's up to the app developer.
 
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 Aztec private state follows a utxo-based model. That is, a private state's current value is represented as one or many [notes](#notes). Each note is stored as an individual leaf in a utxo-based merkle tree: the [private state tree](./../../../concepts/foundation/state_model.md).
 
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 To greatly simplify the experience of writing private state, Aztec.nr provides three different types of private state variable:
 
 - [Singleton<NoteType\>](#singletonnotetype)