libcmd: remove unused savedArgv

this was only used in the pre-exec daemon days.

Change-Id: I3bbb113f9940e6980f01af60e6614a9656b0fd03

lix/libcmd/command.hh

@@ -15,8 +15,6 @@ namespace nix {
 
 extern std::string programPath;
 
-extern char * * savedArgv;
-
 class EvalState;
 struct Pos;
 class Store;

lix/libmain/shared.cc

@@ -33,8 +33,6 @@
 
 namespace nix {
 
-char * * savedArgv;
-
 static bool gcWarning = true;
 
 void printGCWarning()

lix/nix/main.cc

@@ -455,8 +455,6 @@ void registerNixHelp()
 
 int mainWrapped(AsyncIoRoot & aio, int argc, char ** argv)
 {
-    savedArgv = argv;
-
     /* The chroot helper needs to be run before any threads have been
        started. */
     if (argc > 0 && argv[0] == chrootHelperName) {
@@ -645,7 +643,6 @@ int mainWrapped(AsyncIoRoot & aio, int argc, char ** argv)
 
     return 0;
 }
-
 }
 
 int main(int argc, char * * argv)