Revert "Fix potential memory leaks"

src/modules/upower/upower_tooltip.cpp

@@ -9,10 +9,11 @@
 namespace waybar::modules::upower {
 UPowerTooltip::UPowerTooltip(uint iconSize_, uint tooltipSpacing_, uint tooltipPadding_)
     : Gtk::Window(),
-      contentBox(std::make_unique<Gtk::Box>(Gtk::ORIENTATION_VERTICAL)),
       iconSize(iconSize_),
       tooltipSpacing(tooltipSpacing_),
       tooltipPadding(tooltipPadding_) {
+  contentBox = new Gtk::Box(Gtk::ORIENTATION_VERTICAL);
+
   // Sets the Tooltip Padding
   contentBox->set_margin_top(tooltipPadding);
   contentBox->set_margin_bottom(tooltipPadding);