gadu: remove create account widget

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
Revert "gadu: fix create account bevavior in configuration wizard"

This reverts commit fc2b8c077f322ec8f818764a584e5e4243ee49e0.

Conflicts:
	plugins/gadu_protocol/gui/widgets/gadu-create-account-widget.cpp