chore: remove unused code (#2062)

src/lerobot/utils/constants.py

@@ -33,7 +33,6 @@ TRUNCATED = "next.truncated"
 DONE = "next.done"
 
 ROBOTS = "robots"
-ROBOT_TYPE = "robot_type"
 TELEOPERATORS = "teleoperators"
 
 # files & directories

src/lerobot/utils/errors.py

@@ -30,14 +30,3 @@ class DeviceAlreadyConnectedError(ConnectionError):
     ):
         self.message = message
         super().__init__(self.message)
-
-
-class InvalidActionError(ValueError):
-    """Exception raised when an action is already invalid."""
-
-    def __init__(
-        self,
-        message="The action is invalid. Check the value follows what it is expected from the action space.",
-    ):
-        self.message = message
-        super().__init__(self.message)

src/lerobot/utils/utils.py

@@ -330,10 +330,6 @@ class TimerManager:
     def history(self) -> list[float]:
         return deepcopy(self._history)
 
-    @property
-    def fps_history(self) -> list[float]:
-        return [1.0 / t for t in self._history]
-
     @property
     def fps_last(self) -> float:
         return 0.0 if self.last == 0 else 1.0 / self.last