[all variants] Are Source Code PPAs Really Needed?

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http://ubuntuforums.org – I stumbled into some errors with some of the PPAs I have added (most notably Chrome, which I replaced with Chromium). I have been going into all of my computers, giving each PPA a name that I can actually identify it, and realized I have tons of source code PPAs. I am not a developer by any means (although I think it would be nice to be able to create apps, I prefer fixing computers and their OSs as opposed to compiling them). So, do I really need these source code PPAs? I really would like to clean up the list of PPAs if possible-running apt-get update can take up to 5 minutes if my connect (Hardware)