Revert "feat: Adds support for draft in conversation reply box (#4205)" (#4425)

This reverts commit 5ea0436051.

app/javascript/shared/helpers/TimeHelpers.js

@@ -1,21 +0,0 @@
-// Returns a function, that, as long as it continues to be invoked, will not
-// be triggered. The function will be called after it stops being called for
-// N milliseconds. If `immediate` is passed, trigger the function on the
-// leading edge, instead of the trailing.
-
-export const debounce = (func, delay, immediate) => {
-  let timerId;
-  return (...args) => {
-    const boundFunc = func.bind(this, ...args);
-    clearTimeout(timerId);
-    if (immediate && !timerId) {
-      boundFunc();
-    }
-    const calleeFunc = immediate
-      ? () => {
-          timerId = null;
-        }
-      : boundFunc;
-    timerId = setTimeout(calleeFunc, delay);
-  };
-};

app/javascript/shared/helpers/specs/TimeHelpers.spec.js

@@ -1,32 +0,0 @@
-import { debounce } from '../TimeHelpers';
-// Tell Jest to mock all timeout functions
-jest.useFakeTimers('modern');
-
-describe('debounce', () => {
-  test('execute just once with immediate false', () => {
-    let func = jest.fn();
-    let debouncedFunc = debounce(func, 1000);
-
-    for (let i = 0; i < 100; i += 1) {
-      debouncedFunc();
-    }
-
-    // Fast-forward time
-    jest.runAllTimers();
-
-    expect(func).toBeCalledTimes(1);
-  });
-
-  test('execute just once with immediate true', () => {
-    let func = jest.fn();
-    let debouncedFunc = debounce(func, 1000, true);
-
-    for (let i = 0; i < 100; i += 1) {
-      debouncedFunc();
-    }
-
-    jest.runAllTimers();
-
-    expect(func).toBeCalledTimes(1);
-  });
-});