remove unsupported feature

Author: klgill

docs_user/modules/con_adoption-limitations.adoc

@@ -9,10 +9,8 @@ Before you proceed with the adoption, check which features are Technology Previe
 The following features are Technology Previews and have not been tested within the context of the {rhos_long_noacro} adoption:
 
 * NFS Ganesha back end for {rhos_component_storage_file_first_ref}
-* iSCSI, NFS, and FC-based drivers for {block_storage_first_ref}
+* iSCSI and FC-based drivers for {block_storage_first_ref}
 * {block_storage} back end for the {image_service_first_ref}
-* NFS back end for the {image_service}
-* Third-party drivers for the {rhos_component_storage_file}
 
 The following {compute_service_first_ref} features are Technology Previews:
 
@@ -39,7 +37,6 @@ The adoption process does not support the following features:
 * BGP
 * Adopting a FIPS environment
 * The {key_manager} only supports the simple crypto plug-in
-* The {block_storage} only supports RBD back-end adoption
 
 
 //* When you adopt a {OpenStackShort} {rhos_prev_ver} FIPS environment to {rhos_acro} {rhos_curr_ver}, your adopted cluster remains a FIPS cluster. There is no option to change the FIPS status during adoption. If your cluster is FIPS-enabled, you must deploy a FIPS {rhocp_long} cluster to adopt your {OpenStackShort} {rhos_prev_ver} FIPS control plane. For more information about enabling FIPS in {OpenShiftShort}, see link:{defaultOCPURL}/installing/installation-overview#installing-fips[Support for FIPS cryptography] in the {OpenShiftShort} _Installing_ guide.