message: indexer-service: remove unused AllocationPaymentClient interface
diff: /* eslint-disable @typescript-eslint/explicit-module-boundary-types */
  -import { Message as WireMessage } from '@statechannels/client-api-schema'
  import { Attestation, Receipt, SubgraphDeploymentID } from '@graphprotocol/common-ts'
  -import { Wallet, utils } from 'ethers'
  +import { utils } from 'ethers'
  import { PayerMessage } from '@graphprotocol/receipt-manager'
  export interface QueryResult {
  @@ -63,20 +62,6 @@ export interface Allocation {
  createdAtEpoch: number
  }
  -export interface AllocationPaymentClient {
  - allocation: Allocation
  - wallet: Wallet
  - handleMessage(message: WireMessage): Promise<WireMessage | undefined>
  - validatePayment(query: PaidQuery): Promise<string>
  - provideAttestation(
  - channelId: string,
  - query: PaidQuery,
  - attestation: Attestation,
  - ): Promise<WireMessage>
  - declineQuery(channelId: string, query: PaidQuery): Promise<WireMessage>
  - settle(): Promise<void>
  -}
  -
  export class QueryError extends Error {
  status: number
  