DOCSP-42821-drop-true (#9465) (#9480)

(cherry picked from commit b116cfe)

Author: ajhuh-mdb

source/reference/method/db.collection.drop.txt

@@ -32,13 +32,12 @@ Definition
    collection. The method provides a wrapper around the
    :dbcommand:`drop` command.
 
-   :returns:
-     - ``true`` when successfully drops a collection.
-     - ``false`` when collection to drop does not exist.
+   :returns: ``true`` 
 
 .. note:: 
 
-   When run on a sharded cluster, ``db.collection.drop()`` always returns ``true``.
+   If the specified collection doesn't exist, ``db.collection.drop()`` 
+   still returns ``true``.
 
 Compatibility
 -------------