Can not start laravel after trying to install library

I have web-app on Laravel and I tried to update yajra/datatables to last version, so it needed

'Maatwebsite\Excel\ExcelServiceProvider'

I tried composer update, so it didn't help. Now I removed this line from composer.json

But on calling php artisan clear-compiled

It shows me an error:

PHP Fatal error: Class 'Maatwebsite\Excel\ExcelServiceProvider' not found in /var/www/html/http://ift.tt/1noReuS on line 575

Show where I should remove this Maatwebsite files `

via Chebli Mohamed