Remove All API's that are labeled "Remove in 4.0"

package.json

@@ -99,7 +99,6 @@
   "homepage": "https://github.com/cloudevents/sdk-javascript#readme",
   "dependencies": {
     "ajv": "~6.12.3",
-    "axios": "~0.19.2",
     "uuid": "~8.3.0"
   },
   "devDependencies": {

src/index.ts

@@ -2,17 +2,8 @@ import { CloudEvent, Version } from "./event/cloudevent";
 import { ValidationError } from "./event/validation";
 import { CloudEventV03, CloudEventV03Attributes, CloudEventV1, CloudEventV1Attributes } from "./event/interfaces";
 
-import {
-  Emitter,
-  TransportOptions,
-  Options,
-  TransportFunction,
-  EmitterFunction,
-  emitterFor,
-} from "./transport/emitter";
-import { Receiver } from "./transport/receiver";
-import { Protocol } from "./transport/protocols";
-import { Headers, Mode, Binding, HTTP, Message, Serializer, Deserializer, headersFor } from "./message";
+import { Options, TransportFunction, EmitterFunction, emitterFor } from "./transport/emitter";
+import { Headers, Mode, Binding, HTTP, Message, Serializer, Deserializer } from "./message";
 
 import CONSTANTS from "./constants";
 
@@ -32,13 +23,8 @@ export {
   Message,
   Deserializer,
   Serializer,
-  headersFor, // TODO: Deprecated. Remove for 4.0
   HTTP,
   // From transport
-  Emitter, // TODO: Deprecated. Remove for 4.0
-  Receiver, // TODO: Deprecated. Remove for 4.0
-  Protocol, // TODO: Deprecated. Remove for 4.0
-  TransportOptions, // TODO: Deprecated. Remove for 4.0
   TransportFunction,
   EmitterFunction,
   emitterFor,

src/message/index.ts

@@ -1,7 +1,6 @@
 import { IncomingHttpHeaders } from "http";
 import { CloudEvent } from "..";
 import { binary, deserialize, structured, isEvent } from "./http";
-import { headersFor } from "./http/headers";
 
 /**
  * Binding is an interface for transport protocols to implement,
@@ -71,6 +70,3 @@ export const HTTP: Binding = {
   toEvent: deserialize as Deserializer,
   isEvent: isEvent as Detector,
 };
-
-// TODO: Deprecated. Remove this for 4.0
-export { headersFor };

src/transport/emitter.ts

@@ -1,32 +1,6 @@
 import { CloudEvent } from "../event/cloudevent";
-import { axiosEmitter } from "./http";
-import { Protocol } from "./protocols";
-import { Agent } from "http";
 import { HTTP, Message, Mode } from "../message";
 
-/**
- * Options supplied to the Emitter when sending an event.
- * In addition to url and protocol, TransportOptions may
- * also accept custom options that will be passed to the
- * Node.js http functions.
- * @deprecated will be removed in 4.0.0
- */
-export interface TransportOptions {
-  /**
-   * The endpoint that will receieve the event.
-   * @example http://cncf.example.com/receiver
-   */
-  url?: string;
-  /**
-   * The network protocol over which the event will be sent.
-   * @example HTTPStructured
-   * @example HTTPBinary
-   */
-  protocol?: Protocol;
-
-  [key: string]: string | Record<string, unknown> | Protocol | Agent | undefined;
-}
-
 /**
  * Options is an additional, optional dictionary of options that may
  * be passed to an EmitterFunction and TransportFunction
@@ -84,51 +58,3 @@ export function emitterFor(fn: TransportFunction, options = { binding: HTTP, mod
     }
   };
 }
-
-/**
- * A class to send binary and structured CloudEvents to a remote endpoint.
- * Currently, supported protocols are HTTPBinary and HTTPStructured.
- *
- * @see https://github.com/cloudevents/spec/blob/v1.0/http-protocol-binding.md
- * @see https://github.com/cloudevents/spec/blob/v1.0/http-protocol-binding.md#13-content-modes
- * @deprecated Will be removed in 4.0.0. Consider using the emitterFactory
- *
- */
-export class Emitter {
-  url?: string;
-  protocol: Protocol;
-  binaryEmitter: EmitterFunction;
-  structuredEmitter: EmitterFunction;
-
-  constructor(options: TransportOptions = { protocol: Protocol.HTTPBinary }) {
-    this.protocol = options.protocol as Protocol;
-    this.url = options.url;
-
-    this.binaryEmitter = emitterFor(axiosEmitter(this.url as string));
-    this.structuredEmitter = emitterFor(axiosEmitter(this.url as string), { binding: HTTP, mode: Mode.STRUCTURED });
-  }
-
-  /**
-   * Sends the {CloudEvent} to an event receiver over HTTP POST
-   *
-   * @param {CloudEvent} event the CloudEvent to be sent
-   * @param {Object} [options] The configuration options for this event. Options
-   * provided will be passed along to Node.js `http.request()`.
-   * https://nodejs.org/api/http.html#http_http_request_options_callback
-   * @param {string} [options.url] The HTTP/S url that should receive this event.
-   * The URL is optional if one was provided when this emitter was constructed.
-   * In that case, it will be used as the recipient endpoint. The endpoint can
-   * be overridden by providing a URL here.
-   * @returns {Promise} Promise with an eventual response from the receiver
-   * @deprecated Will be removed in 4.0.0. Consider using the emitterFactory
-   */
-  send(event: CloudEvent, options?: TransportOptions): Promise<unknown> {
-    options = options || {};
-    options.url = options.url || this.url;
-    if (options.protocol != this.protocol) {
-      if (this.protocol === Protocol.HTTPBinary) return this.binaryEmitter(event, options);
-      return this.structuredEmitter(event, options);
-    }
-    return this.binaryEmitter(event, options);
-  }
-}