Remove experimental wording on threading in documentation (#6414)

doc/architecture/threading.rst

@@ -17,8 +17,6 @@ Implementation
 Configuration
 ~~~~~~~~~~~~~
 
-.. warning:: Multiple enclave threads are experimental for now. The ``worker_threads`` configuration option should be set to ``0`` in production environments.
-
 To enable multiple worker threads, the ``worker_threads`` configuration option can be used  along with the number of desired threads to ``cchost`` when starting a CCF node.
 
 It is strongly recommended that all CCF nodes run the same number of worker threads.
@@ -32,4 +30,4 @@ It is strongly advised that during the execution of a command the application do
 Any inter-command communication must be performed via the key-value store, to ensure that CCF can rollback commands or change the primary as required.
 
 If an application has global state that exists outside the key-value store, CCF offers several concurrency control primitives (via Open Enclave) to protect memory that could be accessed concurrently by multiple threads.
-It is recommended that these primitives are used rather than other primitives, such as mutexes, which may result in an OCALL.
+It is recommended that these primitives are used rather than other primitives, such as mutexes, which may result in an OCALL.