removed legacy test

packages/mobx-react-lite/__tests__/observer.test.tsx

@@ -49,7 +49,7 @@ function runTestSuite(mode: "observer" | "useObserver") {
                 list: 0
             }
 
-            const TodoItem = obsComponent(({ todo }: { todo: typeof store.todos[0] }) => {
+            const TodoItem = obsComponent(({ todo }: { todo: (typeof store.todos)[0] }) => {
                 renderings.item++
                 return <li>|{todo.title}</li>
             }, true)
@@ -997,38 +997,6 @@ it("dependencies should not become temporarily unobserved", async () => {
     expect(doubleDisposed).toBeCalledTimes(1)
 })
 
-it("Legacy context support", () => {
-    const contextKey = "key"
-    const contextValue = "value"
-
-    function ContextConsumer(_, context) {
-        expect(context[contextKey]).toBe(contextValue)
-        return null
-    }
-
-    ContextConsumer.contextTypes = {
-        [contextKey]: () => null
-    }
-
-    const ObserverContextConsumer = observer(ContextConsumer)
-
-    class ContextProvider extends React.Component {
-        getChildContext() {
-            return { [contextKey]: contextValue }
-        }
-
-        render() {
-            return <ObserverContextConsumer />
-        }
-    }
-
-    ;(ContextProvider as any).childContextTypes = {
-        [contextKey]: () => null
-    }
-
-    render(<ContextProvider />)
-})
-
 it("Throw when trying to set contextType on observer", () => {
     const NamedObserver = observer(function TestCmp() {
         return null