[v13] chore: remove deprecated stuff

src/flush-micro-tasks.ts

@@ -3,28 +3,3 @@ import { setImmediate } from './helpers/timers';
 export function flushMicroTasks() {
   return new Promise((resolve) => setImmediate(resolve));
 }
-
-/**
- * @deprecated To be removed in the next major release.
- */
-type Thenable<T> = { then: (callback: () => T) => unknown };
-
-/**
- * This legacy implementation of `flushMicroTasks` is used for compatibility with
- * older versions of React Native (pre 0.71) which uses Promise polyfil.
- *
- * For users with older version of React Native there is a workaround of using our own
- * Jest preset instead the `react-native` one, but requiring such change would be a
- * breaking change for existing users.
- *
- * @deprecated To be removed in the next major release.
- */
-export function flushMicroTasksLegacy(): Thenable<void> {
-  return {
-    // using "thenable" instead of a Promise, because otherwise it breaks when
-    // using "modern" fake timers
-    then(resolve) {
-      setImmediate(resolve);
-    },
-  };
-}

src/helpers/wrap-async.ts

@@ -1,7 +1,7 @@
 /* istanbul ignore file */
 
 import act, { getIsReactActEnvironment, setReactActEnvironment } from '../act';
-import { flushMicroTasksLegacy } from '../flush-micro-tasks';
+import { flushMicroTasks } from '../flush-micro-tasks';
 import { checkReactVersionAtLeast } from '../react-versions';
 
 /**
@@ -18,7 +18,7 @@ export async function wrapAsync<Result>(callback: () => Promise<Result>): Promis
     try {
       const result = await callback();
       // Flush the microtask queue before restoring the `act` environment
-      await flushMicroTasksLegacy();
+      await flushMicroTasks();
       return result;
     } finally {
       setReactActEnvironment(previousActEnvironment);

src/index.ts

@@ -1,5 +1,5 @@
 import { cleanup } from './pure';
-import { flushMicroTasksLegacy } from './flush-micro-tasks';
+import { flushMicroTasks } from './flush-micro-tasks';
 import { getIsReactActEnvironment, setReactActEnvironment } from './act';
 
 if (!process?.env?.RNTL_SKIP_AUTO_CLEANUP) {
@@ -11,7 +11,7 @@ if (!process?.env?.RNTL_SKIP_AUTO_CLEANUP) {
   if (typeof afterEach === 'function') {
     // eslint-disable-next-line no-undef
     afterEach(async () => {
-      await flushMicroTasksLegacy();
+      await flushMicroTasks();
       cleanup();
     });
   }