Revert "Restore parent mount namespace before executing a child process"

This reverts commit a0ef21262f4d5652bfb65cfacaec01d89c475a93. This
doesn't work in 'nix run' and nix-shell because setns() fails in
multithreaded programs, and Boehm GC mark threads are uncancellable.

Fixes #2646.

1 files changed, 0 insertions, 3 deletions

diff --git a/src/libstore/ssh.cc b/src/libstore/ssh.cc
index cf133b57cb20..5e0e44935cca 100644
--- a/src/libstore/ssh.cc
+++ b/src/libstore/ssh.cc
@@ -1,5 +1,4 @@
 #include "ssh.hh"
-#include "affinity.hh"
 
 namespace nix {
 
@@ -35,9 +34,7 @@ std::unique_ptr<SSHMaster::Connection> SSHMaster::startCommand(const std::string
 
     auto conn = std::make_unique<Connection>();
     conn->sshPid = startProcess([&]() {
-        restoreAffinity();
         restoreSignals();
-        restoreMountNamespace();
 
         close(in.writeSide.get());
         close(out.readSide.get());