First of all, if you mention "ECM Suite", what version do you mean? (This SKU's name is not used for more than 1 year, so you could be speaking about both 10g and 11g)
Secondly, as for "URM component", do you mean a separate Managed Server (in 11g)/Content Server instance (10g), or do you mean RM components?
RM components are the easiest: you can use Component Manager ( http://docs.oracle.com/cd/E23943_01/doc.1111/e10792/c06_components.htm#CHDHCGFB ) or Component Wizard ( http://docs.oracle.com/cd/E23943_01/doc.1111/e10792/c06_components.htm#i1022078 ) to both disable and uninstall whatever components you want to.
As for 10g, the installation manual http://docs.oracle.com/cd/E10316_01/urm/urm_doc_10/documentation/integrator/install_urm_10en.pdf contains a chapter about uninstalling.
As for 11g, the installation manual also contains a chapter about de-installatiion http://docs.oracle.com/cd/E23943_01/doc.1111/e14495/deinstall.htm#CBHDBHJI , but it does not seem to mention specifically Oracle WebCenter Content: Records, so I'm not sure if it allows to choose to uninstall this application only, or it uninstalls everything. At worst, you should be always able to use Weblogic admin tools to do that. Speak to your Weblogic admin, or follow this tutorial: http://www.oracle.com/webfolder/technetwork/tutorials/obe/fmw/wls/10g/r3/appdeploy/deploy/deploy_apps/deploy_apps.htm
I believe that there will be a number of manual steps required to fully uninstall the WCC RM component. metadata rules, and other features are enabled that are not easily disabled without manual cleanup.
I believe the safest method is a full re-install, if possible.