In the contract, there is a custom `error` defined as `TokenDivier__InvalidAmount();` which is not being used anywhere within the provided code snippet. Unused code, including unused custom errors, can clutter the codebase, potentially leading to confusion or maintenance overhead.

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1. Code Clarity: Removing or using unused code improves readability and maintainability of the contract.

2. Gas Optimization: While the impact on gas might be minimal for a single unused error, maintaining a clean codebase can help in reducing the overall bytecode size, potentially saving gas costs in deployment or interactions.

3. Future Proofing: Keeping the code free from unused elements helps in understanding the contract's behavior more clearly, which is crucial for audits, upgrades, or when new developers join the project.

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This cleanup also aids in focusing on the functional aspects of the code during reviews or when performing static analysis, reducing the chances of overlooking actual issues.

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Remove Unused Error: If this error is not needed for any functionality within the contract, remove it to keep the code clean and focused.

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// Remove this line if the error is indeed unused:

// error TokenDivier__InvalidAmount();

Use the Error: If this `error` was intended for some part of the contract not shown here, ensure it's implemented where needed. For example, if it's meant to validate amounts in transactions or calculations:

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if (amount == 0 || amount > maxAmount) {

}

Refactor or Rename: If you plan to use this error for another similar purpose, consider renaming it to reflect its actual use more accurately, correcting the typo from TokenDivier to TokenDivider.