Remove voice messages labs flag

Fixes https://github.com/vector-im/element-web/issues/17151

src/components/views/messages/MVoiceOrAudioBody.tsx

@@ -27,8 +27,7 @@ export default class MVoiceOrAudioBody extends React.PureComponent<IBodyProps> {
         // MSC2516 is a legacy identifier. See https://github.com/matrix-org/matrix-doc/pull/3245
         const isVoiceMessage = !!this.props.mxEvent.getContent()['org.matrix.msc2516.voice']
             || !!this.props.mxEvent.getContent()['org.matrix.msc3245.voice'];
-        const voiceMessagesEnabled = SettingsStore.getValue("feature_voice_messages");
-        if (isVoiceMessage && voiceMessagesEnabled) {
+        if (isVoiceMessage) {
             return <MVoiceMessageBody {...this.props} />;
         } else {
             return <MAudioBody {...this.props} />;

src/components/views/rooms/MessageComposer.tsx

@@ -391,12 +391,10 @@ export default class MessageComposer extends React.Component<IProps, IState> {
                 controls.push(<Stickerpicker key="stickerpicker_controls_button" room={this.props.room} />);
             }
 
-            if (SettingsStore.getValue("feature_voice_messages")) {
             controls.push(<VoiceRecordComposerTile
                 key="controls_voice_record"
                 ref={c => this.voiceRecordingButton = c}
                 room={this.props.room} />);
-            }
 
             if (!this.state.isComposerEmpty || this.state.haveRecording) {
                 controls.push(

src/settings/Settings.tsx

@@ -212,12 +212,6 @@ export const SETTINGS: {[setting: string]: ISetting} = {
         supportedLevels: LEVELS_FEATURE,
         default: false,
     },
-    "feature_voice_messages": {
-        isFeature: true,
-        displayName: _td("Send and receive voice messages"),
-        supportedLevels: LEVELS_FEATURE,
-        default: false,
-    },
     "feature_latex_maths": {
         isFeature: true,
         displayName: _td("Render LaTeX maths in messages"),