Remove more unnecessary polyfills from webapi for Node 16 (#5814)

* feat(webapi): Remove unnecessary polyfills now that we dropped support for Node 14

* feat(webapi): Removed more unnecessary polyfills for Node 16

* chore: changeset

1 files changed, 0 insertions, 57 deletions

diff --git a/packages/webapi/src/lib/ContextEvent.ts b/packages/webapi/src/lib/ContextEvent.ts
deleted file mode 100644
index e712c4da1..000000000
--- a/packages/webapi/src/lib/ContextEvent.ts
+++ /dev/null
@@ -1,57 +0,0 @@
-import { Event } from 'event-target-shim'
-
-/** An event fired by a context requester to signal it desires a named context. */
-export class ContextEvent<T = unknown> extends Event<'context-request'> {
-	constructor(init: ContextEventInit<T>) {
-		super('context-request', { bubbles: true, composed: true })
-
-		init = Object(init) as Required<ContextEventInit<T>>
-
-		this.context = init.context
-	}
-
-	context!: Context<T>
-	multiple!: boolean
-	callback!: ContextCallback<Context<T>>
-}
-
-interface ContextEventInit<T = unknown> {
-	context: Context<T>
-	multiple?: boolean
-	callback: ContextCallback<Context<T>>
-}
-
-/** A Context object defines an optional initial value for a Context, as well as a name identifier for debugging purposes. */
-export type Context<T = unknown> = {
-	name: string
-	initialValue?: T
-}
-
-/** A helper type which can extract a Context value type from a Context type. */
-export type ContextType<T extends Context> = T extends Context<infer Y>
-	? Y
-	: never
-
-/** A function which creates a Context value object */
-export function createContext<T>(
-	name: string,
-	initialValue?: T
-): Readonly<Context<T>> {
-	return {
-		name,
-		initialValue,
-	}
-}
-
-/** A callback which is provided by a context requester and is called with the value satisfying the request. */
-export type ContextCallback<ValueType> = (
-	value: ValueType,
-	dispose?: () => void
-) => void
-
-declare global {
-	interface HTMLElementEventMap {
-		/** A 'context-request' event can be emitted by any element which desires a context value to be injected by an external provider. */
-		'context-request': ContextEvent
-	}
-}