Remove LocaleGuards from SessionConfiguration class

ConfigurationVariable is now using PBD::to_string/string_to for float <=>
string conversions so LocaleGuard is no longer necessary.

libs/ardour/session_configuration.cc

@@ -23,7 +23,6 @@
 
 #include "pbd/error.h"
 #include "pbd/file_utils.h"
-#include "pbd/locale_guard.h"
 #include "pbd/pathexpand.h"
 
 #include "ardour/types.h"
@@ -55,7 +54,6 @@ XMLNode&
 SessionConfiguration::get_state ()
 {
 	XMLNode* root;
-	LocaleGuard lg;
 
 	root = new XMLNode ("Ardour");
 	root->add_child_nocopy (get_variables ());
@@ -68,7 +66,6 @@ XMLNode&
 SessionConfiguration::get_variables ()
 {
 	XMLNode* node;
-	LocaleGuard lg;
 
 	node = new XMLNode ("Config");
 
@@ -160,7 +157,6 @@ SessionConfiguration::load_state ()
 
 		XMLNode* node;
 		if (((node = find_named_node (root, X_("Config"))) != 0)) {
-			LocaleGuard lg;
 			set_variables(*node);
 			info << _("Loaded custom session defaults.") << endmsg;
 		} else {