Remove unused code

ethereum_history_api/oracles/test/helpers.ts

@@ -1,16 +1,6 @@
 import { expect } from 'vitest';
 import { ForeignCallOutput } from '@noir-lang/noir_js';
 
-export async function expectCircuitFail(p: Promise<boolean>): Promise<void> {
-  await expect(p).rejects.toThrow(
-    'Circuit execution failed: Error: Failed to solve brillig function, reason: explicit trap hit in brillig'
-  );
-}
-
-export type FieldsOfType<ObjectType, FieldType> = {
-  [K in keyof ObjectType]: ObjectType[K] extends FieldType ? K : never;
-}[keyof ObjectType];
-
 export interface Account {
   nonce: string;
   balance: string;