remove deprecated constructions

src/app/browser/main/tab/page/navigation/history.cpp

@@ -28,14 +28,14 @@ void History::refresh()
 {
     Memory match;
 
-    historyBack->set_sensitive(
+    historyBack->set_sensitive( // @TODO operate with action status
         try_back(
             match,
             false
         )
     );
 
-    historyForward->set_sensitive(
+    historyForward->set_sensitive( // @TODO operate with action status
         try_forward(
             match,
             false

src/app/browser/main/tab/page/navigation/history/back.cpp

@@ -15,8 +15,4 @@ Back::Back()
     set_tooltip_text(
         _("Back")
     );
-
-    set_sensitive(
-        false // @TODO no effect by set_action_name
-    );
 }

src/app/browser/main/tab/page/navigation/history/forward.cpp

@@ -15,8 +15,4 @@ Forward::Forward()
     set_tooltip_text(
         _("Forward")
     );
-
-    set_sensitive(
-        false // @TODO no effect by set_action_name
-    );
 }