daemon: Remove unused 'Settings' fields.

* nix/libstore/globals.hh (Settings)[sshSubstituterHosts]
[useSshSubstituter, logServers, enableImportNative]: Remove fields.
* nix/libstore/globals.cc (Settings::Settings, Settings::update): Remove
references to these.

nix/libstore/globals.cc

@@ -42,7 +42,6 @@ Settings::Settings()
     syncBeforeRegistering = false;
     useSubstitutes = true;
     useChroot = false;
-    useSshSubstituter = false;
     impersonateLinux26 = false;
     keepLog = true;
 #if HAVE_BZLIB_H
@@ -60,7 +59,6 @@ Settings::Settings()
     envKeepDerivations = false;
     lockCPU = getEnv("NIX_AFFINITY_HACK", "1") == "1";
     showTrace = false;
-    enableImportNative = false;
 }
 
 
@@ -142,11 +140,6 @@ void Settings::update()
     _get(gcKeepDerivations, "gc-keep-derivations");
     _get(autoOptimiseStore, "auto-optimise-store");
     _get(envKeepDerivations, "env-keep-derivations");
-    _get(sshSubstituterHosts, "ssh-substituter-hosts");
-    _get(useSshSubstituter, "use-ssh-substituter");
-    _get(logServers, "log-servers");
-    _get(enableImportNative, "allow-unsafe-native-code-during-evaluation");
-    _get(useCaseHack, "use-case-hack");
 
     string subs = getEnv("NIX_SUBSTITUTERS", "default");
     if (subs == "default") {
@@ -157,8 +150,6 @@ void Settings::update()
 #endif
         substituters.push_back(nixLibexecDir + "/nix/substituters/download-using-manifests.pl");
         substituters.push_back(nixLibexecDir + "/nix/substituters/download-from-binary-cache.pl");
-        if (useSshSubstituter)
-            substituters.push_back(nixLibexecDir + "/nix/substituters/download-via-ssh");
     } else
         substituters = tokenizeString<Strings>(subs, ":");
 }

nix/libstore/globals.hh

@@ -161,12 +161,6 @@ struct Settings {
     /* Whether to build in chroot. */
     bool useChroot;
 
-    /* Set of ssh connection strings for the ssh substituter */
-    Strings sshSubstituterHosts;
-
-    /* Whether to use the ssh substituter at all */
-    bool useSshSubstituter;
-
     /* Whether to impersonate a Linux 2.6 machine on newer kernels. */
     bool impersonateLinux26;
 
@@ -212,12 +206,6 @@ struct Settings {
     /* Whether to show a stack trace if Nix evaluation fails. */
     bool showTrace;
 
-    /* A list of URL prefixes that can return Nix build logs. */
-    Strings logServers;
-
-    /* Whether the importNative primop should be enabled */
-    bool enableImportNative;
-
 private:
     SettingsMap settings, overrides;