Remove unused type guards

[gomes]

Overview

We define wallet methods as type guards in hdwallet-core

However, we don't use them as type guards but only as regular utility methods to check for feature detection e.g

hdwallet/packages/hdwallet-core/src/wallet.ts

Lines 120 to 122 in 9ada7de

 export function supportsBTC(wallet: HDWallet): wallet is BTCWallet { 
   return _.isObject(wallet) && (wallet as any)._supportsBTC; 
 } 

We should remove the unused type guard in all these methods.

References and additional details

hdwallet-core methods implementations:

https://github.com/shapeshift/hdwallet/blob/master/packages/hdwallet-core/src/wallet.ts

Acceptance Criteria

• The hdwallet-core type guards are removed

Need By Date

No response

Screenshots/Mockups

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Estimated effort

No response

[Apotheosis]

Thank you for this @gomesalexandre!