mac: Prepare for -Wunused-functions.

components/autofill/core/browser/autofill_manager.cc

Index: components/autofill/core/browser/autofill_manager.cc
diff --git a/components/autofill/core/browser/autofill_manager.cc b/components/autofill/core/browser/autofill_manager.cc
index 9297ec27af788f06c64ac3e9d6995a25d6f1a2a8..c03f28a39aaa100e5a8b678646f37950f4f56153 100644
--- a/components/autofill/core/browser/autofill_manager.cc
+++ b/components/autofill/core/browser/autofill_manager.cc
@@ -166,16 +166,6 @@ void DeterminePossibleFieldTypesForUpload(
   }
 }
 
-// Returns true if server returned known field types to one or more fields in
-// this form.
-bool HasServerSpecifiedFieldTypes(const FormStructure& form_structure) {
-  for (size_t i = 0; i < form_structure.field_count(); ++i) {
-    if (form_structure.field(i)->server_type() != NO_SERVER_DATA)
-      return true;
-  }
-  return false;
-}
-
 }  // namespace
 
 AutofillManager::AutofillManager(