feat: duplication of event handler

[intls]

1. The same event handler disconnect is registered twice.

2. To ensure the correct state update, the call should be made with the await operator.

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PR-Codex overview

This PR focuses on improving error handling and ensuring the activate method is awaited in the AbstractGlobalWallet class of the web3-react-agw package.

Detailed summary

• Removed the disconnect event listener which reset the state and handled errors.
• Changed the call to this.activate(desiredChainId) to await this.activate(desiredChainId) for proper asynchronous handling.

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