Remove use of new studios feature flag

src/redux/session.js

@@ -147,8 +147,6 @@ module.exports.selectStudioCommentsGloballyEnabled = state =>
 module.exports.selectMuteStatus = state => get(state, ['session', 'session', 'permissions', 'mute_status'],
     {muteExpiresAt: 0, offenses: [], showWarning: false});
 module.exports.selectIsMuted = state => (module.exports.selectMuteStatus(state).muteExpiresAt || 0) * 1000 > Date.now();
-module.exports.selectNewStudiosLaunched = state => get(state, ['session', 'session', 'flags', 'new_studios_launched'],
-    false);
 module.exports.selectStudioTransferLaunched = state => get(state, ['session', 'session', 'flags',
     'studio_transfer_launched'], false);
 

src/views/preview/subactions.jsx

@@ -12,7 +12,7 @@ const {connect} = require('react-redux');
 const {useState} = require('react');
 const projectShape = require('./projectshape.jsx').projectShape;
 
-import {selectIsMuted, selectNewStudiosLaunched} from '../../redux/session.js';
+import {selectIsMuted} from '../../redux/session.js';
 import StudioMuteEditMessage from '../studio/studio-mute-edit-message.jsx';
 
 require('./subactions.scss');
@@ -159,6 +159,6 @@ Subactions.propTypes = {
 
 module.exports = connect(
     state => ({
-        showAddToStudioMuteError: selectNewStudiosLaunched(state) && selectIsMuted(state)
+        showAddToStudioMuteError: selectIsMuted(state)
     })
 )(Subactions);