Addressed feedback

fiftyone/core/collections.py

@@ -9126,9 +9126,7 @@ def get_index_information(self, include_stats=False):
 
         return index_info
 
-    def create_index(
-        self, field_or_spec, unique=False, acknowledged=True, **kwargs
-    ):
+    def create_index(self, field_or_spec, unique=False, wait=True, **kwargs):
         """Creates an index on the given field or with the given specification,
         if necessary.
 
@@ -9162,8 +9160,7 @@ def create_index(
                 :meth:`pymongo:pymongo.collection.Collection.create_index` for
                 supported values
             unique (False): whether to add a uniqueness constraint to the index
-            acknowledged (True): whether to wait and acknowledge index
-                creation
+            wait (True): whether to wait for index creation to finish
             **kwargs: optional keyword arguments for
                 :meth:`pymongo:pymongo.collection.Collection.create_index`
 
@@ -9243,7 +9240,7 @@ def create_index(
             return index_name
 
         # Setting `w=0` sets `acknowledged=False` in pymongo
-        write_concern = WriteConcern(w=0) if not acknowledged else None
+        write_concern = None if wait else WriteConcern(w=0)
 
         if is_frame_index:
             coll = self._dataset._get_frame_collection(

fiftyone/core/dataset.py

@@ -27,7 +27,6 @@
     ReplaceOne,
     UpdateMany,
     UpdateOne,
-    WriteConcern,
 )
 from pymongo.collection import Collection
 from pymongo.errors import CursorNotFound, BulkWriteError
@@ -330,7 +329,6 @@ def __init__(
         self._run_cache = cachetools.LRUCache(5)
 
         self._deleted = False
-        self._write_concern = None
 
         if not _virtual:
             self._update_last_loaded_at()
@@ -1184,7 +1182,6 @@ def _sample_collstats(self):
         return conn.command(
             "collstats",
             self._sample_collection_name,
-            write_concern=self._write_concern,
         )
 
     def _frame_collstats(self):
@@ -1195,7 +1192,6 @@ def _frame_collstats(self):
         return conn.command(
             "collstats",
             self._frame_collection_name,
-            write_concern=self._write_concern,
         )
 
     def first(self):
@@ -7040,9 +7036,9 @@ def _sample_collection_name(self):
 
     @property
     def _sample_collection(self):
-        return self._get_sample_collection(write_concern=self._write_concern)
+        return self._get_sample_collection()
 
-    def _get_sample_collection(self, write_concern=None) -> Collection:
+    def _get_sample_collection(self, write_concern=None):
         return foo.get_db_conn().get_collection(
             self._sample_collection_name, write_concern=write_concern
         )
@@ -7053,9 +7049,9 @@ def _frame_collection_name(self):
 
     @property
     def _frame_collection(self):
-        return self._get_frame_collection(write_concern=self._write_concern)
+        return self._get_frame_collection()
 
-    def _get_frame_collection(self, write_concern=None) -> Collection:
+    def _get_frame_collection(self, write_concern=None):
         if self._frame_collection_name is None:
             return None