Blink Clipboard: Remove extraneous include.

BlobData is never referenced in SystemClipboard, so remove the include.

No intended functional changes.

Change-Id: I34936a04bdcd1caac97e209568886cb054b0fb67
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1832884Reviewed-by: Darwin Huang <huangdarwin@chromium.org>
Reviewed-by: Jarryd Goodman <jarrydg@chromium.org>
Auto-Submit: Darwin Huang <huangdarwin@chromium.org>
Commit-Queue: Jarryd Goodman <jarrydg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#702687}

third_party/blink/renderer/core/clipboard/system_clipboard.cc

@@ -14,7 +14,6 @@
 #include "third_party/blink/renderer/core/clipboard/clipboard_mime_types.h"
 #include "third_party/blink/renderer/core/clipboard/clipboard_utilities.h"
 #include "third_party/blink/renderer/core/clipboard/data_object.h"
-#include "third_party/blink/renderer/platform/blob/blob_data.h"
 #include "third_party/blink/renderer/platform/graphics/image.h"
 #include "third_party/blink/renderer/platform/weborigin/kurl.h"
 #include "third_party/blink/renderer/platform/wtf/std_lib_extras.h"