Remove some more zoom-related code.

sky/engine/core/rendering/style/StyleVisualData.h

Index: sky/engine/core/rendering/style/StyleVisualData.h
diff --git a/sky/engine/core/rendering/style/StyleVisualData.h b/sky/engine/core/rendering/style/StyleVisualData.h
index 006f1b9a8ac7416e64621f7ef7e26e8a3156ecfb..ab8e9d8a9ba65e468e901dd4e76cb2261e851d1b 100644
--- a/sky/engine/core/rendering/style/StyleVisualData.h
+++ b/sky/engine/core/rendering/style/StyleVisualData.h
@@ -42,8 +42,7 @@ public:
     {
         return clip == o.clip
             && hasAutoClip == o.hasAutoClip
-            && textDecoration == o.textDecoration
-            && m_zoom == o.m_zoom;
+            && textDecoration == o.textDecoration;
     }
     bool operator!=(const StyleVisualData& o) const { return !(*this == o); }
 
@@ -51,7 +50,6 @@ public:
     bool hasAutoClip : 1;
     unsigned textDecoration : TextDecorationBits; // Text decorations defined *only* by this element.
 
-    float m_zoom;
 
 private:
     StyleVisualData();