remove SK_SUPPORT_LEGACY_PDF_PIXELSERIALIZER dead code

Bug: skia:
Change-Id: Ia88f3e2fdf6d5c6e5128eaefda0d68c7042ae7a2
Reviewed-on: https://skia-review.googlesource.com/85500
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Hal Canary <halcanary@google.com>
diff --git a/bench/PDFBench.cpp b/bench/PDFBench.cpp
index c2a8e60..0dd3fa1e 100644
--- a/bench/PDFBench.cpp
+++ b/bench/PDFBench.cpp
@@ -84,11 +84,7 @@
             return;
         }
         while (loops-- > 0) {
-            auto object = SkPDFCreateBitmapObject(fImage,
-#ifdef SK_SUPPORT_LEGACY_PDF_PIXELSERIALIZER
-                                                  nullptr,
-#endif
-                                                  false);
+            auto object = SkPDFCreateBitmapObject(fImage);
             SkASSERT(object);
             if (!object) {
                 return;
@@ -125,11 +121,7 @@
             return;
         }
         while (loops-- > 0) {
-            auto object = SkPDFCreateBitmapObject(fImage,
-#ifdef SK_SUPPORT_LEGACY_PDF_PIXELSERIALIZER
-                                                  nullptr,
-#endif
-                                                  false);
+            auto object = SkPDFCreateBitmapObject(fImage);
             SkASSERT(object);
             if (!object) {
                 return;