libtorch_cuda only seems to be imported in Linux. Which is why the
size of the Mac, Windows apps are 700Mb smaller than the Debian app size.
Guessing this is because libtorch_cuda only works on Linux machines?
Anyway, removing libtorch_{cpu,python}.dylib under torch/lib from the
Mac app reduces it's size from 190Mb to 160Mb. 15% reduction isn't too bad
- libtorch_cuda.so (1Gb) and libtorch_cpu.so (700Mb) are large shared
libs that are available at package root and under torch/lib.
- The top level imports are used, so they unused libs are removed from
package
- This reduces the single file package size from 1.6Gb to 920Mb
