Squashed commit of the following:

commit 7db25d7
Author: Mick Vleeshouwer <mick@imick.nl>
Date:   Sun Feb 20 13:56:04 2022 -0800

    Backport `binary_sensor` entity (#765)

    * Backport binary_sensor

    * Add missing descriptions

    * Bugfix

commit f7c280d
Author: Mick Vleeshouwer <mick@imick.nl>
Date:   Sun Feb 20 13:50:07 2022 -0800

    Backport number entity (#766)

commit d93ebc7
Author: Mick Vleeshouwer <mick@imick.nl>
Date:   Sun Feb 20 13:45:52 2022 -0800

    Backport button (#772)

commit 6cb325c
Author: Mick Vleeshouwer <mick@imick.nl>
Date:   Sun Feb 20 13:45:41 2022 -0800

    Backport lock (#769)

commit b738bd1
Author: Mick Vleeshouwer <mick@imick.nl>
Date:   Sun Feb 20 13:45:31 2022 -0800

    Backport executor (#771)

    * Backport executor

    * Add linked_device

commit 11a609c
Author: Mick Vleeshouwer <mick@imick.nl>
Date:   Sun Feb 20 13:16:45 2022 -0800

    Backport switch (#774)

    * Backport switch

    * Remove unnecessary climate platform

commit ccb5fdb
Author: Mick Vleeshouwer <mick@imick.nl>
Date:   Sun Feb 20 12:30:22 2022 -0800

    Backport light (#775)

commit 43c5ada
Author: Mick Vleeshouwer <mick@imick.nl>
Date:   Sun Feb 20 12:23:04 2022 -0800

    Backport scene (#770)

custom_components/tahoma/entity.py

@@ -104,13 +104,6 @@ def extra_state_attributes(self) -> dict[str, Any]:
         return attr
 
 
-@dataclass
-class OverkizBinarySensorDescription(BinarySensorEntityDescription):
-    """Class to describe an Overkiz binary sensor."""
-
-    is_on: Callable[[str], bool] = lambda state: state
-
-
 @dataclass
 class OverkizSelectDescription(SelectEntityDescription):
     """Class to describe an Overkiz select entity."""