fix: remove obsolete TypeScript workaround

Author: gr2m

src/index.ts

@@ -4,43 +4,7 @@ import { paginateRest } from "@octokit/plugin-paginate-rest";
 
 import { VERSION } from "./version";
 
-const CoreWithPlugins = Core.plugin([paginateRest]);
-
-// Workaround for TypeScript bug, see https://github.com/octokit/core.js#a-note-on-typescript
-import {
-  OctokitOptions,
-  OctokitPlugin,
-  ReturnTypeOf,
-  Constructor
-} from "@octokit/core";
-
-/* istanbul ignore next */
-class CoreWithPluginsWorkaround extends CoreWithPlugins {
-  static plugin<T extends OctokitPlugin | OctokitPlugin[]>(pluginOrPlugins: T) {
-    const currentPlugins = this.plugins;
-    const newPlugins = Array.isArray(pluginOrPlugins)
-      ? pluginOrPlugins
-      : [pluginOrPlugins];
-
-    const NewOctokit = class extends this {
-      static plugins = currentPlugins.concat(
-        newPlugins.filter(plugin => !currentPlugins.includes(plugin))
-      );
-    };
-
-    return NewOctokit as typeof NewOctokit & Constructor<ReturnTypeOf<T>>;
-  }
-
-  static defaults(defaults: OctokitOptions) {
-    return class OctokitWithDefaults extends this {
-      constructor(options: OctokitOptions = {}) {
-        super(Object.assign({}, defaults, options));
-      }
-    };
-  }
-}
-
-export const Octokit = CoreWithPluginsWorkaround.defaults({
+export const Octokit = Core.plugin([paginateRest]).defaults({
   authStrategy: createActionAuth,
   userAgent: `octokit-action.js/${VERSION}`
 });