I concur with Seabody. Personally I have never uninstalled any downloaded content, much less between patches.
Doing so is essentially unnecessary during the Patch process, since EA does not care what content you have installed in the DCCache folder.
I believe the caveat that mealazarte is most likely referring to is third-party custom content installed as ".package" files. Most guides suggest that you uninstall those type of packages, just in case one of them is incompatible with your new Patch Level.