cygwin:the /usr/share directory

[ping]

hi experts:
I'm recently running out of disk and , it looks simply the /usr/share 
occupies around 5G .

[ping@ping-new-laptop usr]$ du -sh ./share/
4.4G    ./share/


I'm thinking to remove this directory to release some space. but not 
sure if this will affect the whole cygwin from running properly.
or, if I can remove part of the contents, what is the minimum packages 
that I need to keep there?



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