drop 'orphan' property

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

Index: sky/engine/core/rendering/style/RenderStyle.h
diff --git a/sky/engine/core/rendering/style/RenderStyle.h b/sky/engine/core/rendering/style/RenderStyle.h
index a7856e7f665d5a22f3fddf3d2e74d05b6af28d20..c62bc9fcbe2f3432053bc74f7a28d884ad273a3d 100644
--- a/sky/engine/core/rendering/style/RenderStyle.h
+++ b/sky/engine/core/rendering/style/RenderStyle.h
@@ -598,9 +598,7 @@ public:
     bool isLink() const { return noninherited_flags.isLink; }
 
     short widows() const { return rareInheritedData->widows; }
-    short orphans() const { return rareInheritedData->orphans; }
     bool hasAutoWidows() const { return rareInheritedData->m_hasAutoWidows; }
-    bool hasAutoOrphans() const { return rareInheritedData->m_hasAutoOrphans; }
     EPageBreak pageBreakInside() const { return static_cast<EPageBreak>(noninherited_flags.pageBreakInside); }
     EPageBreak pageBreakBefore() const { return static_cast<EPageBreak>(noninherited_flags.pageBreakBefore); }
     EPageBreak pageBreakAfter() const { return static_cast<EPageBreak>(noninherited_flags.pageBreakAfter); }
@@ -944,9 +942,6 @@ public:
     void setHasAutoWidows() { SET_VAR(rareInheritedData, m_hasAutoWidows, true); SET_VAR(rareInheritedData, widows, initialWidows()); }
     void setWidows(short w) { SET_VAR(rareInheritedData, m_hasAutoWidows, false); SET_VAR(rareInheritedData, widows, w); }
 
-    void setHasAutoOrphans() { SET_VAR(rareInheritedData, m_hasAutoOrphans, true); SET_VAR(rareInheritedData, orphans, initialOrphans()); }
-    void setOrphans(short o) { SET_VAR(rareInheritedData, m_hasAutoOrphans, false); SET_VAR(rareInheritedData, orphans, o); }
-
     // For valid values of page-break-inside see http://www.w3.org/TR/CSS21/page.html#page-break-props
     void setPageBreakInside(EPageBreak b) { ASSERT(b == PBAUTO || b == PBAVOID); noninherited_flags.pageBreakInside = b; }
     void setPageBreakBefore(EPageBreak b) { noninherited_flags.pageBreakBefore = b; }
@@ -1143,7 +1138,6 @@ public:
     static TextIndentType initialTextIndentType() { return TextIndentNormal; }
     static EVerticalAlign initialVerticalAlign() { return BASELINE; }
     static short initialWidows() { return 2; }
-    static short initialOrphans() { return 2; }
     static Length initialLineHeight() { return Length(-100.0, Percent); }
     static ETextAlign initialTextAlign() { return TASTART; }
     static TextAlignLast initialTextAlignLast() { return TextAlignLastAuto; }