Remove unused CPDF_Dictionary::GetFloatFor().

Change-Id: I4d861c0266a93f0f4dbe1c79633ad2c3b51fd283
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/70851
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/core/fpdfapi/parser/cpdf_dictionary.h b/core/fpdfapi/parser/cpdf_dictionary.h
index 1911ef0..57796d7 100644
--- a/core/fpdfapi/parser/cpdf_dictionary.h
+++ b/core/fpdfapi/parser/cpdf_dictionary.h
@@ -64,7 +64,6 @@
   CPDF_Stream* GetStreamFor(const ByteString& key);
   CFX_FloatRect GetRectFor(const ByteString& key) const;
   CFX_Matrix GetMatrixFor(const ByteString& key) const;
-  float GetFloatFor(const ByteString& key) const { return GetNumberFor(key); }
 
   bool KeyExist(const ByteString& key) const;
   std::vector<ByteString> GetKeys() const;