src: zlib: revert concatenated-stream changes
Revert "src: fix windows build error" and "zlib: support concatenated gzip files".
This reverts commits be413ac7 and 1183ba47.
Conflicts: test/parallel/test-zlib-from-multiple-gzip-with-garbage.js test/parallel/test-zlib-from-multiple-gzip.js test/parallel/test-zlib-from-multiple-huge-gzip.js
Fixes: npm errors here. Equivalent Node PR here. If there are no objections I'd like to re-add this behavior behind an option after this is reverted.