Composer on Windows - what is that "Linux" folder ?

Hello,

(Sorry but I did not find the proper forum for the whole Composer suite)

I recently installed Intel Composer 2018 on Windows and I see a "Linux" folder in the installation repository: C:\Program Files (x86)\IntelSWTools\compilers_and_libraries_2018.3.210\linux  .There is a lot of linux typed files (*.a, *.so) in it and it weighs 1.6Gb.

I am curious and I tried to delete it => Everything still goes fine ! (compilation and execution of my program). My program is compiled with ICC and uses MKL and Daal. Everything in "sequential" version (no multithreading)

I wonder what is that folder for ?

 NB : I unchecked "gnu debugger" during the installation. There is the same folder in the previous Composer version (2017) installation repository.

Thanks,

Guillaume A.