docs(examples): remove unnecessary type annotations (#3855)

Typed events in Socket.IO 4.0 remove the need for writing type
annotations in callbacks of reserved events.

Author: MaximeKjaer

examples/angular-todomvc/server.ts

@@ -1,4 +1,4 @@
-import { Server, Socket } from "socket.io";
+import { Server } from "socket.io";
 
 const io = new Server(8080, {
   cors: {
@@ -15,7 +15,7 @@ interface Todo {
 
 let todos: Array<Todo> = [];
 
-io.on("connect", (socket: Socket) => {
+io.on("connect", (socket) => {
     socket.emit("todos", todos);
 
     // note: we could also create a CRUD (create/read/update/delete) service for the todo list

examples/typescript/server.ts

@@ -1,8 +1,8 @@
-import { Server, Socket } from "socket.io";
+import { Server } from "socket.io";
 
 const io = new Server(8080);
 
-io.on("connect", (socket: Socket) => {
+io.on("connect", (socket) => {
     console.log(`connect ${socket.id}`);
 
     socket.on("ping", (cb) => {