Move the encrypt/decrypt decision out of db and into the view

src/paperless/db.py

@@ -12,15 +12,11 @@ class GnuPG(object):
 
     @classmethod
     def decrypted(cls, file_handle):
-        if(not settings.ENABLE_ENCRYPTION):
-            return file_handle.read()
         return cls.gpg.decrypt_file(
             file_handle, passphrase=settings.PASSPHRASE).data
 
     @classmethod
     def encrypted(cls, file_handle):
-        if(not settings.ENABLE_ENCRYPTION):
-            return file_handle.read()
         return cls.gpg.encrypt_file(
             file_handle,
             recipients=None,