Remove collatz

test/collatz.test.js

@@ -1,21 +0,0 @@
-const {collatz} = require('./_30s.js');
-
-test('collatz is a Function', () => {
-  expect(collatz).toBeInstanceOf(Function);
-});
-test('When n is even, divide by 2', () => {
-  expect(collatz(8)).toBe(4);
-});
-test('When n is odd, times by 3 and add 1', () => {
-  expect(collatz(9)).toBe(28);
-});
-test('Eventually reaches 1', () => {
-  let n = 9;
-  while (true) {
-    if (n === 1) {
-      expect(n).toBe(1);
-      break;
-    }
-    n = collatz(n);
-  }
-});