[ trivial ] prune duplicate word

Author: andf-mongodb

source/core/security-explicit-client-side-encryption.txt

@@ -124,7 +124,7 @@ The MongoDB 4.2 server supports using :doc:`schema validation
 collection. If the collection validation :query:`$jsonSchema`
 requires encryption for a field, clients performing explicit (manual)
 field level encryption **must** 
-:method:`encrypt <ClientEncryption.encrypt()>` encrypt that field.
+:method:`encrypt <ClientEncryption.encrypt()>` that field.
 
 For complete documentation on server-side client-side field level
 encryption enforcement, see