Revert "Fix install scripts debugging"

This reverts commit d650c54fe4. The proposed fix
is incorrect since the Configurable class has no knowledge about used debug
options. These are used only in upper layers when configuring loggers.

Reviewed-By: Martin Babinsky <mbabinsk@redhat.com>

ipaserver/install/server/install.py

@@ -896,8 +896,6 @@ def install(installer):
             args.append("--no-sshd")
         if options.mkhomedir:
             args.append("--mkhomedir")
-        if options.debug:
-            args.append("--debug")
         run(args, redirect_output=True)
         print()
     except Exception: