refactor: remove incorrect address assignment in Web3Wallet initialization

[blueogin]

Description

Remove incorrect default address assignment in web3Wallet initialization

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• PR title matches follow: (Feature|Bug|Chore) Task Name
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Summary by Sourcery

Bug Fixes:

• Prevent Web3Wallet from automatically assigning its primary address to the first derived or KMS-provided address during initialization, avoiding incorrect address state.

[sourcery-ai]

Hey - I've left some high level feedback:

• Now that this.address is no longer set in the KMS and mnemonic paths, verify whether the class still needs a separate address property at all and either remove it entirely or make addresses[0] the single source of truth to avoid inconsistent state.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- Now that `this.address` is no longer set in the KMS and mnemonic paths, verify whether the class still needs a separate `address` property at all and either remove it entirely or make `addresses[0]` the single source of truth to avoid inconsistent state.

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