chore: remove an old test for old migration that we now know works (#9841)

src/test/e2e/system-user-migration.test.ts

@@ -1,43 +0,0 @@
-import { log } from 'db-migrate-shared';
-import getLogger from '../../test/fixtures/no-logger';
-import dbInit, { type ITestDb } from '../../test/e2e/helpers/database-init';
-import { migrateDb } from '../../migrator';
-
-log.setLogLevel('error');
-
-let db: ITestDb;
-afterAll(async () => {
-    await db.destroy();
-});
-test('System user creation migration correctly sets is_system', async () => {
-    jest.setTimeout(15000);
-    db = await dbInit('system_user_migration', getLogger, {
-        stopMigrationAt: '20231221143955-feedback-table.js',
-        dbInitMethod: 'legacy',
-    });
-
-    await db.rawDatabase.raw(`
-        INSERT INTO "users"
-            (name, username, email, created_by_user_id)
-        VALUES
-            ('Test Person', 'testperson', 'testperson@getunleash.io', 1);
-    `);
-
-    // Run the migration
-    await migrateDb(db.config, '20231222071533-unleash-system-user.js');
-
-    // Check the results
-    const { rows: userResults } = await db.rawDatabase.raw(`
-        SELECT * FROM "users" ORDER BY id;
-    `);
-
-    console.log(userResults.map((r) => `${r.username} (${r.id})`));
-
-    expect(userResults.length).toEqual(2);
-    expect(userResults[0].is_system).toEqual(true);
-    expect(userResults[0].id).toEqual(-1337);
-    expect(userResults[0].username).toEqual('unleash_system_user');
-    expect(userResults[1].is_system).toEqual(false);
-    expect(userResults[1].id).toEqual(1);
-    expect(userResults[1].username).toEqual('testperson');
-});