Remove candidate show/hide/update related code

ui/views/controls/textfield/textfield.cc

Index: ui/views/controls/textfield/textfield.cc
diff --git a/ui/views/controls/textfield/textfield.cc b/ui/views/controls/textfield/textfield.cc
index 73cccd53caee69362e41da731ea84207ccd45fc4..9e4111dd0fe1713489e27be3ca6d63faa8f20db2 100644
--- a/ui/views/controls/textfield/textfield.cc
+++ b/ui/views/controls/textfield/textfield.cc
@@ -1615,12 +1615,6 @@ void Textfield::ExtendSelectionAndDelete(size_t before, size_t after) {
 
 void Textfield::EnsureCaretInRect(const gfx::Rect& rect) {}
 
-void Textfield::OnCandidateWindowShown() {}
-
-void Textfield::OnCandidateWindowUpdated() {}
-
-void Textfield::OnCandidateWindowHidden() {}
-
 bool Textfield::IsEditCommandEnabled(int command_id) {
   return IsCommandIdEnabled(command_id);
 }