Removed unused methods from |AutofillScanner|.

Bug: 1007974
Change-Id: I074665a39769866416387c3f367e784a3f2936d9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1827004
Commit-Queue: Matthias Körber <koerber@google.com>
Commit-Queue: Vadym Doroshenko <dvadym@chromium.org>
Reviewed-by: Vadym Doroshenko <dvadym@chromium.org>
Cr-Commit-Position: refs/heads/master@{#700229}

components/autofill/core/browser/form_parsing/autofill_scanner.h

@@ -45,9 +45,6 @@ class AutofillScanner {
   // |RewindTo()|.
   size_t SaveCursor();
 
-  // This is only for logging purposes.
-  size_t CursorIndex() { return static_cast<size_t>(cursor_ - begin_); }
-
  private:
   void Init(const std::vector<AutofillField*>& fields);