Do not check for interactive session to shut down dev server (#8845)

Author: jeremywadsack

packages/react-scripts/scripts/start.js

@@ -165,7 +165,7 @@ checkBrowsers(paths.appPath, isInteractive)
       });
     });
 
-    if (isInteractive || process.env.CI !== 'true') {
+    if (process.env.CI !== 'true') {
       // Gracefully exit when stdin ends
       process.stdin.on('end', function() {
         devServer.close();