LibWeb: Remove Node::m_font_size

This was only ever used in order to set the m_font_size for another
Node, so it can just go. :^)

Userland/Libraries/LibWeb/Layout/Node.cpp

@@ -205,16 +205,6 @@ void NodeWithStyle::apply_style(const CSS::StyleProperties& specified_style)
     m_font = specified_style.computed_font();
     m_line_height = specified_style.line_height(*this);
 
-    {
-        constexpr int default_font_size = 10;
-        auto parent_font_size = parent() == nullptr ? default_font_size : parent()->font_size();
-        auto length = specified_style.length_or_fallback(CSS::PropertyID::FontSize, CSS::Length(default_font_size, CSS::Length::Type::Px));
-        // FIXME: em sizes return 0 here, for some reason
-        m_font_size = length.resolved_or_zero(*this, parent_font_size).to_px(*this);
-        if (m_font_size == 0)
-            m_font_size = default_font_size;
-    }
-
     {
         auto attachments = specified_style.property(CSS::PropertyID::BackgroundAttachment);
         auto clips = specified_style.property(CSS::PropertyID::BackgroundClip);
@@ -539,7 +529,6 @@ NonnullRefPtr<NodeWithStyle> NodeWithStyle::create_anonymous_wrapper() const
 {
     auto wrapper = adopt_ref(*new BlockContainer(const_cast<DOM::Document&>(document()), nullptr, m_computed_values.clone_inherited_values()));
     wrapper->m_font = m_font;
-    wrapper->m_font_size = m_font_size;
     wrapper->m_line_height = m_line_height;
     return wrapper;
 }

Userland/Libraries/LibWeb/Layout/Node.h

@@ -146,8 +146,6 @@ public:
 
     Gfx::FloatPoint box_type_agnostic_position() const;
 
-    float font_size() const;
-
     enum class SelectionState {
         None,        // No selection
         Start,       // Selection starts in this Node
@@ -204,7 +202,6 @@ public:
 
     const Gfx::Font& font() const { return *m_font; }
     float line_height() const { return m_line_height; }
-    float font_size() const { return m_font_size; }
     Vector<CSS::BackgroundLayerData> const& background_layers() const { return computed_values().background_layers(); }
     const CSS::ImageStyleValue* list_style_image() const { return m_list_style_image; }
 
@@ -221,7 +218,6 @@ private:
     CSS::ComputedValues m_computed_values;
     RefPtr<Gfx::Font> m_font;
     float m_line_height { 0 };
-    float m_font_size { 0 };
     RefPtr<CSS::ImageStyleValue> m_list_style_image;
 
     bool m_has_definite_height { false };
@@ -255,13 +251,6 @@ inline const Gfx::Font& Node::font() const
     return parent()->font();
 }
 
-inline float Node::font_size() const
-{
-    if (m_has_style)
-        return static_cast<const NodeWithStyle*>(this)->font_size();
-    return parent()->font_size();
-}
-
 inline const CSS::ImmutableComputedValues& Node::computed_values() const
 {
     if (m_has_style)