[not part of default build] Remove unnecessary #include files

layout/mathml/base/src/nsMathMLmiFrame.cpp

@@ -31,7 +31,6 @@
 #include "nsUnitConversion.h"
 #include "nsIStyleContext.h"
 #include "nsStyleConsts.h"
-#include "nsStyleChangeList.h"
 #include "nsINameSpaceManager.h"
 #include "nsIRenderingContext.h"
 #include "nsIFontMetrics.h"

layout/mathml/base/src/nsMathMLmtextFrame.cpp

@@ -30,7 +30,6 @@
 #include "nsUnitConversion.h"
 #include "nsIStyleContext.h"
 #include "nsStyleConsts.h"
-#include "nsStyleChangeList.h"
 #include "nsINameSpaceManager.h"
 #include "nsIRenderingContext.h"
 #include "nsIFontMetrics.h"