address deprecations

climpred/classes.py

@@ -908,11 +908,11 @@ def remove_seasonality(
             >>> HindcastEnsemble.remove_seasonality(seasonality="month")
             <climpred.HindcastEnsemble>
             Initialized:
-                SST      (init, lead, member) float64 -0.2349 -0.216 ... 0.6476 0.6433
+                SST      (init, lead, member) float64 -0.2392 -0.2203 ... 0.618 0.6136
             Uninitialized:
-                SST      (time, member) float64 -0.1789 0.005732 -0.257 ... 0.4359 0.4154
+                SST      (time, member) float64 -0.1969 -0.01221 -0.275 ... 0.4179 0.3974
             Observations:
-                SST      (time) float32 -0.3739 -0.3248 -0.1575 ... 0.2757 0.3736 0.4778
+                SST      (time) float32 -0.4015 -0.3524 -0.1851 ... 0.2481 0.346 0.4502
         """
 
         def _remove_seasonality(ds, initialized_dim="init", seasonality=None):

climpred/utils.py

@@ -294,7 +294,9 @@ def convert_init_lead_to_valid_time_lead(
         [skill.sel(lead=lead).swap_dims({"init": "valid_time"}) for lead in skill.lead],
         "lead",
     )
-    return add_init_from_time_lead(swapped.drop("init")).dropna("valid_time", how="all")
+    return add_init_from_time_lead(swapped.drop_vars("init")).dropna(
+        "valid_time", how="all"
+    )
 
 
 def convert_valid_time_lead_to_init_lead(
@@ -343,7 +345,9 @@ def convert_valid_time_lead_to_init_lead(
         [skill.sel(lead=lead).swap_dims({"valid_time": "init"}) for lead in skill.lead],
         "lead",
     )
-    return add_time_from_init_lead(swapped.drop("valid_time")).dropna("init", how="all")
+    return add_time_from_init_lead(swapped.drop_vars("valid_time")).dropna(
+        "init", how="all"
+    )
 
 
 def find_start_dates_for_given_init(control, single_init):