supervisor: remove config stub

The configuration is now handled by the config API, so we no longer
need the stub function here.

sandbox/supervisor.mjs

@@ -3,14 +3,13 @@ import {spawn} from 'child_process';
 let grist;
 
 function startGrist(newConfig={}) {
-  saveNewConfig(newConfig);
   // H/T https://stackoverflow.com/a/36995148/11352427
   grist = spawn('./sandbox/run.sh', {
     stdio: ['inherit', 'inherit', 'inherit', 'ipc']
   });
   grist.on('message', function(data) {
     if (data.action === 'restart') {
-      console.log('Restarting Grist with new environment');
+      console.log('Restarting Grist with new configuration');
 
       // Note that we only set this event handler here, after we have
       // a new environment to reload with. Small chance of a race here
@@ -26,10 +25,4 @@ function startGrist(newConfig={}) {
   return grist;
 }
 
-// Stub function
-function saveNewConfig(newConfig) {
-  // TODO: something here to actually persist the new config before
-  // restarting Grist.
-}
-
 startGrist();