Remove many _CAPS structure names.

core/src/fpdfapi/fpdf_font/font_int.h

Index: core/src/fpdfapi/fpdf_font/font_int.h
diff --git a/core/src/fpdfapi/fpdf_font/font_int.h b/core/src/fpdfapi/fpdf_font/font_int.h
index 7ff97e5a77b7532ef672573ba10160507f53bb8c..1d1f006115b0f0c66115af1221c1bcb3671eaf00 100644
--- a/core/src/fpdfapi/fpdf_font/font_int.h
+++ b/core/src/fpdfapi/fpdf_font/font_int.h
@@ -162,18 +162,6 @@ class CPDF_CMap {
   CPDF_CMap* m_pUseMap;
 };
 
-typedef struct _FileHeader {
-  uint8_t btTag[4];
-  uint8_t btVersion;
-  uint8_t btFormat;
-  uint8_t btReserved1[2];
-  FX_DWORD dwStartIndex;
-  FX_DWORD dwEndIndex;
-  FX_DWORD dwDataSize;
-  FX_DWORD dwDataOffset;
-  FX_DWORD dwRecordSize;
-} FXMP_FILEHEADER;
-
 class CPDF_CID2UnicodeMap {
  public:
   CPDF_CID2UnicodeMap();