Remove abandoned Voice Broadcasts labs flag (#28548)

* Remove abandoned Voice Broadcasts labs flag

Any existing voice broadcasts will be shown as a series of voice messages which will sequence play as normal

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Remove dead code

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Update snapshots

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

---------

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

src/@types/matrix-js-sdk.d.ts

@@ -10,7 +10,6 @@ import type { IWidget } from "matrix-widget-api";
 import type { BLURHASH_FIELD } from "../utils/image-media";
 import type { JitsiCallMemberEventType, JitsiCallMemberContent } from "../call-types";
 import type { ILayoutStateEvent, WIDGET_LAYOUT_EVENT_TYPE } from "../stores/widgets/types";
-import type { VoiceBroadcastInfoEventContent, VoiceBroadcastInfoEventType } from "../voice-broadcast/types";
 import type { EncryptedFile } from "matrix-js-sdk/src/types";
 
 // Extend Matrix JS SDK types via Typescript declaration merging to support unspecced event fields and types
@@ -37,9 +36,6 @@ declare module "matrix-js-sdk/src/types" {
         "im.vector.modular.widgets": IWidget | {};
         [WIDGET_LAYOUT_EVENT_TYPE]: ILayoutStateEvent;
 
-        // Unstable voice broadcast state events
-        [VoiceBroadcastInfoEventType]: VoiceBroadcastInfoEventContent;
-
         // Element custom state events
         "im.vector.web.settings": Record<string, any>;
         "org.matrix.room.preview_urls": { disable: boolean };
@@ -78,7 +74,5 @@ declare module "matrix-js-sdk/src/types" {
             waveform?: number[];
         };
         "org.matrix.msc3245.voice"?: {};
-
-        "io.element.voice_broadcast_chunk"?: { sequence: number };
     }
 }