deleted com.google.android.googlequicksearchbox - device doesn't start anymore

Nexus 5 is running on stock 5.1.1, rooted with cf auto root.

In order to remove some bloatware I have deleted the com.google.android.googlequicksearchbox. The launcher is still the stock one. Seems like it won't boot without the search box. Device starts with "android is starting optimizing app" und stucks at "android is starting starting apps".

What can I do? Please help :)