Describe the bug
When a BoxList containing a dictionary is created, when looking up the value of the BoxList, the field _bypass_evaluation is present in the dictionary. This is unexpected.

To Reproduce
Steps to reproduce the behavior:

Using Dynaconf v3.2.0:

from dynaconf import Dynaconf

settings = Dynaconf()
settings.set("key", [{"d": "v"}])
settings.key

This provides the value of the key as:
<BoxList: [{'d': 'v', '_bypass_evaluation': False}]>

However, it is expected to be:
<BoxList: [{'d': 'v'}]>

Executing under the following environment
This happens in Ubuntu 20.04, python3, using Dynaconf v3.2.0

Proposed solution
The following line:
self._store._box_config["_bypass_evaluation"] = False

at

can be replaced with:
self._store._box_config.pop("_bypass_evaluation")

This has the same result as setting it to False with the benefit that it is removed completely.