This is commonly called the "tree shaking" [1] which is a particular mode of the general dead code elimination. One of main challenges would be the reproduction

This is commonly called the "tree shaking" [1] which is a particular mode of the general dead code elimination. One of main challenges would be the reproduction of somehow readable source code after the tree shaking. [1] https://en.wikipedia.org/wiki/Tree_shaking https://en.wikipedia.org/wiki/Tree_shaking