You can uninstall the DMZ Secure Proxy Server using the Installation Manager command line.
./imcl uninstall com.ibm.websphere.NDDMZ.v85,optional_feature_ID
-installationDirectory installation_directory
You can remove a list of features that are separated by commas—the feature ID thinclient indicates the standalone thin clients and resource adapters. If a list of features is not specified, the entire product is uninstalled.
For more information on using the imcl command to uninstall the product, see the IBM Installation Manager Version 1.6 Information Center or the IBM Installation Manager Version 1.5 Information Center.