Remove bogus test case from concurrency.test.js

It's not actually testing for transaction isolation, just concurrent
updates

Author: penberg

integration-tests/tests/concurrency.test.js

@@ -79,49 +79,6 @@ test("Concurrent writes", async (t) => {
     cleanup(t.context);
 });
 
-test("Concurrent transaction isolation", async (t) => {
-    const db = t.context.db;
-
-    await db.exec(`
-    DROP TABLE IF EXISTS transaction_users;
-    CREATE TABLE transaction_users (
-      id TEXT PRIMARY KEY,
-      name TEXT,
-      email TEXT
-    )
-  `);
-
-    const aliceId = generateUUID();
-    const bobId = generateUUID();
-
-    await db.exec(`
-    INSERT INTO transaction_users (id, name, email) VALUES 
-    ('${aliceId}', 'Alice', 'alice@example.org'),
-    ('${bobId}', 'Bob', 'bob@example.com')
-  `);
-
-    const updateUser = db.transaction(async (id, name, email) => {
-        const stmt = await db.prepare("UPDATE transaction_users SET name = :name, email = :email WHERE id = :id");
-        await stmt.run({ id, name, email });
-    });
-
-    const promises = [];
-    for (let i = 0; i < 10; i++) {
-        promises.push(updateUser(aliceId, `Alice${i}`, `alice${i}@example.org`));
-        promises.push(updateUser(bobId, `Bob${i}`, `bob${i}@example.com`));
-    }
-
-    await Promise.all(promises);
-
-    const stmt = await db.prepare("SELECT * FROM transaction_users ORDER BY name");
-    const results = await stmt.all();
-    t.is(results.length, 2);
-    t.truthy(results[0].name.startsWith('Alice'));
-    t.truthy(results[1].name.startsWith('Bob'));
-
-    cleanup(t.context);
-});
-
 test("Concurrent reads and writes", async (t) => {
     const db = t.context.db;