menu: drop left/right keys navigation (#510)

Co-authored-by: SG <who.just.the.doctor@gmail.com>

applications/menu/menu.c

@@ -253,10 +253,6 @@ int32_t menu_task(void* p) {
             menu_down(menu);
         } else if(m.type == MenuMessageTypeOk) {
             menu_ok(menu);
-        } else if(m.type == MenuMessageTypeLeft) {
-            menu_back(menu);
-        } else if(m.type == MenuMessageTypeRight) {
-            menu_ok(menu);
         } else if(m.type == MenuMessageTypeBack) {
             menu_back(menu);
         } else if(m.type == MenuMessageTypeIdle) {

applications/menu/menu_event.c

@@ -53,10 +53,6 @@ void menu_event_input_callback(InputEvent* input_event, void* context) {
         message.type = MenuMessageTypeUp;
     } else if(input_event->key == InputKeyDown) {
         message.type = MenuMessageTypeDown;
-    } else if(input_event->key == InputKeyRight) {
-        message.type = MenuMessageTypeRight;
-    } else if(input_event->key == InputKeyLeft) {
-        message.type = MenuMessageTypeLeft;
     } else if(input_event->key == InputKeyOk) {
         message.type = MenuMessageTypeOk;
     } else if(input_event->key == InputKeyBack) {