Remove deprecations from README (#279)

README.md

@@ -16,14 +16,11 @@ $ npm install cookie
 ## API
 
 ```js
-const cookie = require("cookie");
-// import * as cookie from 'cookie';
+import * as cookie from "cookie";
 ```
 
 ### cookie.parseCookie(str, options)
 
-Alias: `parse(str, options)` ([deprecated](#deprecated))
-
 Parse an HTTP `Cookie` header string and return an [object](#cookie-object) of all cookie name-value pairs.
 The `str` argument is the string representing a `Cookie` header value and `options` is an
 optional object containing additional parsing options.
@@ -74,8 +71,6 @@ cookie.parseSetCookie(
 
 ### cookie.stringifySetCookie(setCookieObj, options)
 
-Alias: `serialize(str, val, options)` ([deprecated](#deprecated))
-
 Stringifies a [`Set-Cookie` object](#set-cookie-object) into a `Set-Cookie` header string.
 
 ```js
@@ -243,14 +238,6 @@ function onRequest(req, res) {
 http.createServer(onRequest).listen(3000);
 ```
 
-## Deprecated
-
-These APIs will be removed in the future:
-
-- `parse` - use new `parseCookie` name
-- `stringify` - use new `stringifySetCookie` name
-- `stringify(str, val, opts)` - use `stringifySetCookie(obj, opts)`
-
 ## Testing
 
 ```sh