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, 5 deletions

diff --git a/src/nix/edit.cc b/src/nix/edit.cc
index d8d5895bd..c9671f76d 100644
--- a/src/nix/edit.cc
+++ b/src/nix/edit.cc
@@ -3,7 +3,6 @@
 #include "eval.hh"
 #include "attr-path.hh"
 #include "progress-bar.hh"
-#include "affinity.hh"
 
 #include <unistd.h>
 
@@ -73,10 +72,6 @@ struct CmdEdit : InstallableCommand
 
         stopProgressBar();
 
-        restoreAffinity();
-        restoreSignals();
-        restoreMountNamespace();
-
         execvp(args.front().c_str(), stringsToCharPtrs(args).data());
 
         throw SysError("cannot run editor '%s'", editor);