Bonjour must be started manually every reboot

bonjour

Actually removing Bonjour will hardly clear any space, it is a really small App – about 4MB

If you need to clear space:

Open File Explorer

Click on your hard drive

On the Manage Tab, click Cleanup

Let Disk Cleanup do its initial scan

Select Everything in the list and choose Delete

Start Disk Cleanup again

Let Disk Cleanup do its initial scan

This time in the resulting dialog, click ‘Cleanup System Files’

Let Disk Cleanup run another scan

Select Everything in the list and choose Delete