Revert "Warn if submodule is missing for libuv"
Revert "Warn if submodule is missing for libuv"

This reverts commit 334ab510ce941e294480cbcae3278479ba364bfd.

daurnimator/luv,xpol/luv,xpol/luv,RomeroMalaquias/luv,luvit/luv,kidaa/luv,zhaozg/luv,zhaozg/luv,mkschreder/luv,joerg-krause/luv,kidaa/luv,NanXiao/luv,RomeroMalaquias/luv,mkschreder/luv,luvit/luv,daurnimator/luv,NanXiao/luv,RomeroMalaquias/luv,leecrest/luv,DBarney/luv,daurnimator/luv,leecrest/luv,DBarney/luv,joerg-krause/luv