Please interpret this answer as having the best possible intention of helping you. :)
Although this doesn't tell you how to do what you've asked for, and although I don't have any idea about your personal "disk space circumstances", I'd strongly recommend pursuing a different solution.
One option is simply "get more disk space"; I accept this may not be an option in your case.
For another approach, you may care to try a tool like WinDirStat (for Windows -- I have no experience of doing this on Linux, though KDE has KDirStat, I think). This will allow you to find the "hot spots" quickly.
Experience suggests that micro-managing space by trimming lots of small files doesn't usually give you a good return for your time, when compared with offloading, say, three films onto an external drive.
My current TeXLive
texmf-dist/doc subtree is 1.25 Gb; I think it's worth every byte to have it at my fingertips.