Remove unused property Fiber.fiber_loss

Change-Id: I7596efaeaa1c6cdef15118521662e54db34fd9e6

gnpy/core/elements.py

@@ -348,11 +348,6 @@ class Fiber(_Node):
                           f'  (conn loss out includes EOL margin defined in eqpt_config.json)',
                           f'  pch out (dBm): {self.pch_out_db!r}'])
 
-    @property
-    def fiber_loss(self):
-        """Fiber loss in dB, not including padding attenuator"""
-        return self.params.loss_coef * self.params.length + self.params.con_in + self.params.con_out
-
     @property
     def loss(self):
         """total loss including padding att_in: useful for polymorphism with roadm loss"""