simplify

src/configs/object_config.py

@@ -29,10 +29,8 @@ def __init__(self, initial: Gaussian, t_birth: int, t_death: int, *args, **kwarg
  """
  assert isinstance(initial, Gaussian), "Argument of wrong type!"
  assert isinstance(t_birth, int), "Argument of wrong type!"
- assert t_birth >= 0, "object birth should be positive!"
  assert isinstance(t_death, int), "Argument of wrong type!"
- assert t_death >= 0, "object death should be positive!"
- assert t_death >= t_birth, "object death should be greater or equal than birth!"
+ assert 0 <= t_birth <= t_death
 
  self.id = next(Object.new_id)
  self.initial_state = initial