Revert "Show error dialog when wrong buildConfig is used"

This reverts commit fa578fb37c.

src/main.js

@@ -31,7 +31,6 @@ if (squirrelStartup()) {
 }
 
 var settings = require('./common/settings');
-const buildConfig = require('./common/config/buildConfig');
 var certificateStore = require('./main/certificateStore').load(path.resolve(app.getPath('userData'), 'certificate.json'));
 const {createMainWindow} = require('./main/mainWindow');
 const appMenu = require('./main/menus/app');
@@ -368,14 +367,6 @@ app.on('ready', () => {
   if (global.willAppQuit) {
     return;
   }
-  if (buildConfig.enableServerManagement === false && buildConfig.defaultTeams.length === 0) {
-    dialog.showMessageBox({
-      type: 'error',
-      title: 'Mattermost',
-      message: 'When "enableServerManagement: false" is specified in buildConfig.js,\n"defaultTeams" must have one team at least.'
-    });
-    app.exit();
-  }
   if (global.isDev) {
     installExtension.default(installExtension.REACT_DEVELOPER_TOOLS).
       then((name) => console.log(`Added Extension:  ${name}`)).