Update variable_reference.py

Author: MostafaGomaa93

PyStemmusScope/bmi/variable_reference.py

@@ -123,7 +123,6 @@ class BmiVariable:
         units="cm s-1",
         grid=0,
         keys=["ForcingData", "applied_inf"],
-        all_timesteps=True,
     ),
     # groundwater vars (STEMMUS_SCOPE)
     BmiVariable(