Remove the strings.h portability header
Summary:Although, according to the manpage, these functions are defined in `strings.h`, but they are also defined in `string.h`. We never actually use these functions via `strings.h`, and instead only ever reference them via `string.h`.
To keep things sane, lets just move the functions into `string.h` and kill `strings.h`.
Reviewed By: yfeldblum
Differential Revision:
D3181596
fb-gh-sync-id:
8a474df510ddafc4c595b08b809a7c33e3256177
fbshipit-source-id:
8a474df510ddafc4c595b08b809a7c33e3256177