DM/PDF: stop adding unused rasterizer keywords

dm/DMSrcSink.cpp

Index: dm/DMSrcSink.cpp
diff --git a/dm/DMSrcSink.cpp b/dm/DMSrcSink.cpp
index e704f74d030e9b4b8784c62b687abe879957170c..65adaf8b295e74b65ae0d1a0f31748148a583b83 100644
--- a/dm/DMSrcSink.cpp
+++ b/dm/DMSrcSink.cpp
@@ -1072,8 +1072,6 @@ static Error draw_skdocument(const Src& src, SkDocument* doc, SkWStream* dst) {
     return "";
 }
 
-PDFSink::PDFSink(const char* rasterizer) : fRasterizer(rasterizer) {}
-
 Error PDFSink::draw(const Src& src, SkBitmap*, SkWStream* dst, SkString*) const {
     SkAutoTUnref<SkDocument> doc(SkDocument::CreatePDF(dst));
     if (!doc) {
@@ -1084,9 +1082,6 @@ Error PDFSink::draw(const Src& src, SkBitmap*, SkWStream* dst, SkString*) const
     info.emplace_back(SkString("Subject"),
                       SkString("rendering correctness test"));
     info.emplace_back(SkString("Creator"), SkString("Skia/DM"));
-
-    info.emplace_back(SkString("Keywords"),
-                      SkStringPrintf("Rasterizer:%s;", fRasterizer));
     doc->setMetadata(&info[0], info.count(), nullptr, nullptr);
     return draw_skdocument(src, doc.get(), dst);
 }