style(3p/nix): Remove 'using std::*' from types.hh r/840

It is considered bad form to use things from includes in headers, as
these directives propagate to everywhere else and can make it
confusing.

types.hh (which is includes almost literally everywhere) had some of
these directives, which this commit removes.

1 files changed, 2 insertions, 2 deletions

diff --git a/third_party/nix/src/libstore/pathlocks.cc b/third_party/nix/src/libstore/pathlocks.cc
index eeee5ee1e9c9..642e64a62bac 100644
--- a/third_party/nix/src/libstore/pathlocks.cc
+++ b/third_party/nix/src/libstore/pathlocks.cc
@@ -73,12 +73,12 @@ bool lockFile(int fd, LockType lockType, bool wait) {
 
 PathLocks::PathLocks() : deletePaths(false) {}
 
-PathLocks::PathLocks(const PathSet& paths, const string& waitMsg)
+PathLocks::PathLocks(const PathSet& paths, const std::string& waitMsg)
     : deletePaths(false) {
   lockPaths(paths, waitMsg);
 }
 
-bool PathLocks::lockPaths(const PathSet& paths, const string& waitMsg,
+bool PathLocks::lockPaths(const PathSet& paths, const std::string& waitMsg,
                           bool wait) {
   assert(fds.empty());