Remove prototype for unimplemented CPDF_BAFontMap::Initialize().

Change-Id: Ie0d04eb29b1c23f43f366bd1aa864665253d5457
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/85974
Auto-Submit: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
diff --git a/core/fpdfdoc/cpdf_bafontmap.h b/core/fpdfdoc/cpdf_bafontmap.h
index beabbea..ea85be0 100644
--- a/core/fpdfdoc/cpdf_bafontmap.h
+++ b/core/fpdfdoc/cpdf_bafontmap.h
@@ -51,7 +51,6 @@
     ByteString sFontName;
   };
 
-  void Initialize();
   RetainPtr<CPDF_Font> FindFontSameCharset(ByteString* sFontAlias,
                                            FX_Charset nCharset);
   RetainPtr<CPDF_Font> FindResFontSameCharset(const CPDF_Dictionary* pResDict,