Bump colander from 1.8.3 to 2.0 (#3112)

* Bump colander from 1.8.3 to 2.0

Bumps [colander](https://github.com/Pylons/colander) from 1.8.3 to 2.0.
- [Release notes](https://github.com/Pylons/colander/releases)
- [Changelog](https://github.com/Pylons/colander/blob/main/CHANGES.rst)
- [Commits](Pylons/colander@1.8.3...2.0)

---
updated-dependencies:
- dependency-name: colander
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

* Remove dead code after Pylons/colander#264

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: Mathieu Leplatre <mathieu@mozilla.com>

kinto/core/resource/schema.py

@@ -225,8 +225,6 @@ def deserialize(self, cstruct=colander.null):
         values = {}
 
         schema_values = super().deserialize(cstruct)
-        if schema_values is colander.drop:
-            return schema_values
 
         # Deserialize querystring field filters (see docstring e.g)
         for k, v in cstruct.items():

kinto/schema_validation.py

@@ -16,10 +16,6 @@ def schema_type(self, **kw):
     def deserialize(self, cstruct=colander.null):
         # Start by deserializing a simple mapping.
         validated = super().deserialize(cstruct)
-
-        # In case it is optional in parent schema.
-        if not validated or validated in (colander.null, colander.drop):
-            return validated
         try:
             check_schema(validated)
         except ValidationError as e:

requirements.txt

@@ -1,5 +1,5 @@
 bcrypt==4.1.1
-colander==1.8.3
+colander==2.0
 cornice==6.0.1
 cornice-swagger==1.0.1
 dockerflow==2022.8.0