Remove alt text from images.

sky/engine/core/editing/TextIterator.h

Index: sky/engine/core/editing/TextIterator.h
diff --git a/sky/engine/core/editing/TextIterator.h b/sky/engine/core/editing/TextIterator.h
index 60c1e1951d2c3782ae858d63bf4bcc4a3d09e812..8b15ba5da01bfdb0ea95f9e2f71e9f98118f2e62 100644
--- a/sky/engine/core/editing/TextIterator.h
+++ b/sky/engine/core/editing/TextIterator.h
@@ -41,9 +41,8 @@ enum TextIteratorBehavior {
     TextIteratorEmitsCharactersBetweenAllVisiblePositions = 1 << 0,
     TextIteratorIgnoresStyleVisibility = 1 << 2,
     TextIteratorEmitsOriginalText = 1 << 3,
-    TextIteratorEmitsImageAltText = 1 << 5,
-    TextIteratorEntersAuthorShadowRoots = 1 << 6,
-    TextIteratorEmitsObjectReplacementCharacter = 1 << 7
+    TextIteratorEntersAuthorShadowRoots = 1 << 5,
+    TextIteratorEmitsObjectReplacementCharacter = 1 << 6
 };
 typedef unsigned TextIteratorBehaviorFlags;
 
@@ -196,8 +195,6 @@ private:
     // Used when the visibility of the style should not affect text gathering.
     bool m_ignoresStyleVisibility;
 
-    bool m_emitsImageAltText;
-
     bool m_entersAuthorShadowRoots;
 
     bool m_emitsObjectReplacementCharacter;