pdfviewer: don't delete variables, they are managed by the doc now

experimental/PdfViewer/SkPdfRenderer.cpp

Index: experimental/PdfViewer/SkPdfRenderer.cpp
===================================================================
--- experimental/PdfViewer/SkPdfRenderer.cpp	(revision 9983)
+++ experimental/PdfViewer/SkPdfRenderer.cpp	(working copy)
@@ -842,9 +842,6 @@
 
     // TODO(edisonn): delete all the objects after rendering was complete, in this way pdf is rendered faster
     // and the cleanup can happen while the user looks at the image
-    delete _ty;
-    delete vtx;
-    delete vty;
 
     return ret;
 }
@@ -887,9 +884,6 @@
 
     PdfResult ret = PdfOp_Td(pdfContext, canvas, looper);
 
-    delete zero;  // TODO(edisonn): do not alocate and delete constants!
-    delete tl;
-
     return ret;
 }