Revert of SkPDF: PDF/A runtime switch

src/pdf/SkPDFDocument.h

Index: src/pdf/SkPDFDocument.h
diff --git a/src/pdf/SkPDFDocument.h b/src/pdf/SkPDFDocument.h
index f5e8a11d842860d0bac4e832bee81a2e7a69fe4f..da14e8d60ecdc07e62c65828664f99792dff6097 100644
--- a/src/pdf/SkPDFDocument.h
+++ b/src/pdf/SkPDFDocument.h
@@ -18,8 +18,7 @@
         SkWStream* stream,
         void (*doneProc)(SkWStream*, bool),
         SkScalar rasterDpi,
-        SkPixelSerializer* jpegEncoder,
-        bool pdfa);
+        SkPixelSerializer* jpegEncoder);
 
 // Logically part of SkPDFDocument (like SkPDFCanon), but separate to
 // keep similar functionality together.
@@ -48,8 +47,7 @@
     SkPDFDocument(SkWStream*,
                   void (*)(SkWStream*, bool),
                   SkScalar,
-                  SkPixelSerializer*,
-                  bool);
+                  SkPixelSerializer*);
     virtual ~SkPDFDocument();
     SkCanvas* onBeginPage(SkScalar, SkScalar, const SkRect&) override;
     void onEndPage() override;
@@ -81,11 +79,12 @@
     sk_sp<SkPDFDict> fDests;
     sk_sp<SkPDFDevice> fPageDevice;
     sk_sp<SkCanvas> fCanvas;
+    #ifdef SK_PDF_GENERATE_PDFA
     sk_sp<SkPDFObject> fID;
     sk_sp<SkPDFObject> fXMP;
+    #endif
     SkScalar fRasterDpi;
     SkPDFMetadata fMetadata;
-    bool fPDFA;
 };
 
 #endif  // SkPDFDocument_DEFINED