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, 3 insertions, 2 deletions

diff --git a/third_party/nix/src/libstore/binary-cache-store.cc b/third_party/nix/src/libstore/binary-cache-store.cc
index 487c12b531..37d1c1a440 100644
--- a/third_party/nix/src/libstore/binary-cache-store.cc
+++ b/third_party/nix/src/libstore/binary-cache-store.cc
@@ -289,7 +289,7 @@ void BinaryCacheStore::queryPathInfoUncached(
           }});
 }
 
-Path BinaryCacheStore::addToStore(const string& name, const Path& srcPath,
+Path BinaryCacheStore::addToStore(const std::string& name, const Path& srcPath,
                                   bool recursive, HashType hashAlgo,
                                   PathFilter& filter, RepairFlag repair) {
   // FIXME: some cut&paste from LocalStore::addToStore().
@@ -316,7 +316,8 @@ Path BinaryCacheStore::addToStore(const string& name, const Path& srcPath,
   return info.path;
 }
 
-Path BinaryCacheStore::addTextToStore(const string& name, const string& s,
+Path BinaryCacheStore::addTextToStore(const std::string& name,
+                                      const std::string& s,
                                       const PathSet& references,
                                       RepairFlag repair) {
   ValidPathInfo info;