printing::Image: remove unused constructor

printing/image.h

Index: printing/image.h
diff --git a/printing/image.h b/printing/image.h
index f0832328dd07d9a1a1fc710477e8ac09e1b98ddf..e055d189587aaba2d05fe458b56b46c64fe25389 100644
--- a/printing/image.h
+++ b/printing/image.h
@@ -27,11 +27,6 @@ class Metafile;
 // The main purpose is testing image contents.
 class PRINTING_EXPORT Image {
  public:
-  // Creates the image from the given file on disk.  Uses extension to
-  // defer file type. PNG and EMF (on Windows) currently supported.
-  // If image loading fails size().IsEmpty() will be true.
-  explicit Image(const base::FilePath& path);
-
   // Creates the image from the metafile.  Deduces bounds based on bounds in
   // metafile.  If loading fails size().IsEmpty() will be true.
   explicit Image(const Metafile& metafile);
@@ -77,8 +72,6 @@ class PRINTING_EXPORT Image {
 
   bool LoadPng(const std::string& compressed);
 
-  bool LoadMetafile(const std::string& data);
-
   bool LoadMetafile(const Metafile& metafile);
 
   // Pixel dimensions of the image.