DOCSP-42109 Cleanup

Author: lindseymoore

source/agg-exp-ops.txt

@@ -111,8 +111,7 @@ how to include your expression in common aggregates builder methods:
 - ``project(fields(computed("<field name>", <expression>)))``
 - ``group(<expression>)``
 
-.. TODO To learn more about these methods, see the
-.. :ref:`kotlin-sync-aggregation`.
+To learn more about these methods, see :ref:`kotlin-sync-aggregation`.
 
 Constructor Methods
 -------------------