(DOCSP-4709): Remove bullet about not being supported by project

Author: melissamahoney-mongodb

source/query-bar.txt

@@ -73,10 +73,6 @@ Limitations
     operators.
   - The :query:`$expr` and :query:`$text` operators.
 
-- The :ref:`Project <query-bar-project>` query bar option does not
-  support the :manual:`$slice </reference/operator/projection/slice/>`
-  operator.
-
 .. class:: hidden
 
    .. toctree::