fix a potential bug spotted by CI [skip ci]

Signed-off-by: DONNOT Benjamin <[email protected]>

Author: BDonnot

grid2op/Environment/baseEnv.py

@@ -3355,7 +3355,6 @@ def _aux_update_detachment_info(self):
             self._gen_p_detached[:] = self._prev_gen_p
             self._gen_p_detached[~self._gens_detached] = 0.
 
-            self._storage_p_detached[:] = 0.
             self._storage_p_detached[:] = self._storage_power
             self._storage_p_detached[~self._storages_detached] = 0.
             self._storage_power[self._storages_detached] = 0.