Cleanup various IFX_ text interfaces.

core/fxcrt/include/fx_arb.h

Index: core/fxcrt/include/fx_arb.h
diff --git a/core/fxcrt/include/fx_arb.h b/core/fxcrt/include/fx_arb.h
index 6a0af83150e16233d408262463b93b38fd956595..6928519a8043c352f5f2625485e26a4447eab8c3 100644
--- a/core/fxcrt/include/fx_arb.h
+++ b/core/fxcrt/include/fx_arb.h
@@ -10,8 +10,6 @@
 #include "core/fxcrt/include/fx_system.h"
 #include "core/fxcrt/include/fx_ucd.h"
 
-class IFX_ArabicChar;
-
 struct FX_ARBFORMTABLE {
   uint16_t wIsolated;
   uint16_t wFinal;
@@ -40,21 +38,6 @@ enum FX_ARBPOSITION {
   FX_ARBPOSITION_Medial,
 };
 
-class IFX_ArabicChar {
- public:
-  static IFX_ArabicChar* Create();
-  virtual ~IFX_ArabicChar() {}
-  virtual void Release() = 0;
-  virtual FX_BOOL IsArabicChar(FX_WCHAR wch) const = 0;
-  virtual FX_BOOL IsArabicFormChar(FX_WCHAR wch) const = 0;
-  virtual FX_WCHAR GetFormChar(FX_WCHAR wch,
-                               FX_WCHAR prev = 0,
-                               FX_WCHAR next = 0) const = 0;
-  virtual FX_WCHAR GetFormChar(const CFX_Char* cur,
-                               const CFX_Char* prev,
-                               const CFX_Char* next) const = 0;
-};
-
 void FX_BidiLine(CFX_WideString& wsText, int32_t iBaseLevel = 0);
 void FX_BidiLine(CFX_TxtCharArray& chars,
                  int32_t iCount,