Remove macOS text position fudge factors (no longer needed with wx 3.3)

src/slic3r/GUI/TabButton.cpp

@@ -182,6 +182,7 @@ void TabButton::render(wxDC &dc)
         pt.y = (size.y - showimg.GetHeight()) / 2;
         dc.DrawBitmap(showimg, pt);
     }
+
 }
 
 void TabButton::messureSize()