Consolidate network token logic?

[samajammin]

Noticing we use the getNetworkToken in a few places:
https://github.com/ethereum/clrfund/blob/develop/vue-app/src/utils/networks.ts

But in other spots we rely on the currency value of chain info:
https://github.com/ethereum/clrfund/blob/develop/vue-app/src/plugins/Web3/constants/chains.ts

[samajammin]

Context / decision related to this, I'm wondering if we should specifically reference Arbitrum ETH as arbETH vs ETH to avoid any potential confusion across the app.

[corwintines]

Since we only use getNetworkToken in one spot (https://github.com/ethereum/clrfund/blob/develop/vue-app/src/api/recipient-registry-optimistic.ts) I propose we just get rid of it in favor of the chain.currency method.