ENH:auto switch use ams option

jira:[none]

Change-Id: Ia1d5231284515226277b16d771342141e654a23d
(cherry picked from commit 956f1b9a59c11bce0428c3162beac45a5272c919)

src/slic3r/GUI/DeviceManager.cpp

@@ -915,11 +915,6 @@ bool MachineObject::can_unload_filament()
     return result;
 }
 
-bool MachineObject::is_support_ams_mapping()
-{
-    return true;
-}
-
 bool MachineObject::is_support_amx_ext_mix_mapping() {
     return true;
 }