[Clean-up] Remove unused codes

components/autofill/content/renderer/autofill_agent.h

Index: components/autofill/content/renderer/autofill_agent.h
diff --git a/components/autofill/content/renderer/autofill_agent.h b/components/autofill/content/renderer/autofill_agent.h
index a4cdd1171efe1b0b22db795a3e82f779ac4924dc..971e5304a300f94dbc09a0c10e741dc6f45292af 100644
--- a/components/autofill/content/renderer/autofill_agent.h
+++ b/components/autofill/content/renderer/autofill_agent.h
@@ -269,10 +269,6 @@ class AutofillAgent : public content::RenderFrameObserver,
   // Was the query node autofilled prior to previewing the form?
   bool was_query_node_autofilled_;
 
-  // Have we already shown Autofill suggestions for the field the user is
-  // currently editing?  Used to keep track of state for metrics logging.
-  bool has_shown_autofill_popup_for_current_edit_;
-
   // Whether or not to ignore text changes.  Useful for when we're committing
   // a composition when we are defocusing the WebView and we don't want to
   // trigger an autofill popup to show.