Remove "indexed_at" from dataframe

dbnomics/__init__.py

@@ -186,7 +186,7 @@ def fetch_series_by_api_link(api_link, max_nb_series=None,
         return pd.DataFrame()
 
     common_columns = ["@frequency", "provider_code", "dataset_code", "dataset_name", "series_code", "series_name",
-                      "indexed_at", "original_period", "period", "original_value", "value"]
+                      "original_period", "period", "original_value", "value"]
 
     normalized_series_list = list(map(normalize_dbnomics_series, series_list))
 
@@ -315,7 +315,7 @@ def normalize_dbnomics_series(series):
     # Flatten dimensions.
     dimensions = series.get("dimensions") or {}
     series = {
-        **without_keys(series, keys={"dimensions"}),
+        **without_keys(series, keys={"dimensions", "indexed_at"}),
         **dimensions,
     }