diff --git a/wx/lib/agw/aui/auibar.py b/wx/lib/agw/aui/auibar.py
index df1d75a1..5a1f2334 100644
--- a/wx/lib/agw/aui/auibar.py
+++ b/wx/lib/agw/aui/auibar.py
@@ -36,8 +36,6 @@ import six
 
 from .aui_constants import *
 
-# wxPython version string
-_VERSION_STRING = wx.VERSION_STRING
 
 # AuiToolBar events
 wxEVT_COMMAND_AUITOOLBAR_TOOL_DROPDOWN = wx.NewEventType()
@@ -2604,10 +2602,7 @@ class AuiToolBar(wx.Control):
         # find out if the mouse cursor is inside the dropdown rectangle
         if overflow_rect.Contains((pt.x, pt.y)):
 
-            if _VERSION_STRING < "2.9":
-                leftDown = wx.GetMouseState().LeftDown()
-            else:
-                leftDown = wx.GetMouseState().LeftIsDown()
+            leftDown = wx.GetMouseState().LeftIsDown()
 
             if leftDown:
                 overflow_state = AUI_BUTTON_STATE_PRESSED