Remove unreachable code

Removing same elsif from install_check method.

Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
Reviewed-By: Tibor Dudlak <tdudlak@redhat.com>

ipaserver/install/adtrust.py

@@ -381,15 +381,6 @@ def install_check(standalone, options, api):
                                       allow_empty=False):
                 raise ScriptError("Aborting installation.")
 
-    elif os.path.exists(paths.SMB_CONF):
-        print("WARNING: The smb.conf already exists. Running "
-              "ipa-adtrust-install will break your existing samba "
-              "configuration.\n\n")
-        if not options.unattended:
-            if not ipautil.user_input("Do you wish to continue?",
-                                      default=False,
-                                      allow_empty=False):
-                raise ScriptError("Aborting installation.")
     elif os.path.exists(paths.SMB_CONF):
         print("WARNING: The smb.conf already exists. Running "
               "ipa-adtrust-install will break your existing samba "