Remove SkWriter32::contiguousArray().

This method requires SkWriter32 have a contiguous array.
It does, and I plan to keep it that way (last time we checked
it's faster), but this turns that feature back into an
implementation detail.

This feature is only used by another unused feature, deep copies of
ops arrays in SkPictureData.  Kill that, kill this.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1932223003

Depends on https://codereview.chromium.org/1936563002/

Only deleting API
TBR=reed@google.com

Review-Url: https://codereview.chromium.org/1932223003
diff --git a/src/core/SkPictureRecord.h b/src/core/SkPictureRecord.h
index 59bd92d..8504c00 100644
--- a/src/core/SkPictureRecord.h
+++ b/src/core/SkPictureRecord.h
@@ -47,17 +47,12 @@
         return fImageRefs;
     }
 
-    sk_sp<SkData> opData(bool deepCopy) const {
+    sk_sp<SkData> opData() const {
         this->validate(fWriter.bytesWritten(), 0);
 
         if (fWriter.bytesWritten() == 0) {
             return SkData::MakeEmpty();
         }
-
-        if (deepCopy) {
-            return SkData::MakeWithCopy(fWriter.contiguousArray(), fWriter.bytesWritten());
-        }
-
         return fWriter.snapshotAsData();
     }