Fix typo in arrow_dataset (#7328)

Author: AndreaFrancis

src/datasets/arrow_dataset.py

@@ -808,7 +808,7 @@ def from_pandas(
         and therefore doesn't have an associated cache directory.
         This may change in the feature, but in the meantime if you
         want to reduce memory usage you should write it back on disk
-        and reload using using e.g. save_to_disk / load_from_disk.
+        and reload using e.g. save_to_disk / load_from_disk.
 
         Args:
             df (`pandas.DataFrame`):
@@ -908,7 +908,7 @@ def from_dict(
         and therefore doesn't have an associated cache directory.
         This may change in the feature, but in the meantime if you
         want to reduce memory usage you should write it back on disk
-        and reload using using e.g. save_to_disk / load_from_disk.
+        and reload using e.g. save_to_disk / load_from_disk.
 
         Args:
             mapping (`Mapping`):
@@ -973,7 +973,7 @@ def from_list(
         and therefore doesn't have an associated cache directory.
         This may change in the feature, but in the meantime if you
         want to reduce memory usage you should write it back on disk
-        and reload using using e.g. save_to_disk / load_from_disk.
+        and reload using e.g. save_to_disk / load_from_disk.
 
         Args:
             mapping (`List[dict]`): A list of mappings of strings to row values.