I have found that the adjustments made to the cars cameras are stored in C:\Users\******\Documents\Assetto Corsa\cfg\cars\. If you delete the files on that folder, the views are restored to default.
Also, the file called user_ff.ini in C:\Users\******\Documents\Assetto Corsa\cfg\ keeps the adjustments made to the force feedback of every car. To reset the settings, edit the file and change all the modified data to VALUE=1.000. You can also delete the file with the same result. If you don't want the values to be saved, set the file's attributes to read-only.