chore: Remove ava from test setup

packages/backend/ava.config.mjs

@@ -1,5 +0,0 @@
-export default {
-  require: ['ts-node/register', './src/config/app.ts'],
-  files: ['**/*.test.ts'],
-  extensions: ['ts'],
-};

packages/backend/package.json

@@ -132,7 +132,6 @@
     "@types/pino": "^7.0.5",
     "@types/pluralize": "^0.0.30",
     "@types/showdown": "^2.0.1",
-    "ava": "^5.3.1",
     "nodemon": "^2.0.13",
     "sinon": "^11.1.2",
     "ts-node": "^10.2.1",

packages/backend/src/graphql/queries/get-user.test.ts

@@ -1,8 +0,0 @@
-import test from 'ava';
-
-const fn = () => 'foo';
-
-test('getUser graphQL query', (t) => {
-  // TODO: Write a test for getUser graphQL query
-  t.is(fn(), 'foo');
-});