Delete contrib/libs/libunwind.
- source_filter: "^contrib/libs/libunwind_master"
includes:
- unwind.h: contrib/libs/libunwind_master/include/unwind.h
-- source_filter: "^contrib/libs/libunwind/"
- includes:
- - unwind.h: contrib/libs/libunwind/include/unwind.h
- source_filter: "^contrib/libs/cppkafka"
includes:
