fix: remove feature toggle from MultiplexerSessionContainer's init method (#643)

fix: remove feat toggle from MultiplexerSessionContainer's init
---------

Signed-off-by: Jayaseelan-James <jayaseelan.james@ni.com>

Author: jayaseelan-james

ni_measurementlink_service/session_management/_reservation.py

@@ -203,7 +203,6 @@ def _grpc_channel_pool(self) -> GrpcChannelPool:
 class MultiplexerSessionContainer(_BaseSessionContainer):
     """Manages multiplexer session information."""
 
-    @requires_feature(MULTIPLEXER_SUPPORT_2024Q2)
     def __init__(
         self,
         session_management_client: SessionManagementClient,