debconf/GRMLBASE: drop wicd preseeding to avoid errors with installation.

debconf/GRMLBASE: drop wicd preseeding to avoid errors with installation.

Preseeding wicd with a user that doesn't exist *yet*
causes wicd to fai installation with:

| Setting up wicd-daemon (1.7.0+ds1-6) ...
| adduser: The user `grml' does not exist.
| dpkg: error processing wicd-daemon (--configure):
|  subprocess installed post-installation script returned error exit status 1
| dpkg: dependency problems prevent configuration of wicd-gtk:
|  wicd-gtk depends on wicd-daemon (= 1.7.0+ds1-6); however:
|   Package wicd-daemon is not configured yet.
| dpkg: error processing wicd-gtk (--configure):
|  dependency problems - leaving unconfigured
| configured to not write apport reports
| dpkg: dependency problems prevent configuration of wicd:
|  wicd depends on wicd-daemon (= 1.7.0+ds1-6); however:
|   Package wicd-daemon is not configured yet.
|  wicd depends on wicd-gtk (= 1.7.0+ds1-6) | wicd-curses (= 1.7.0+ds1-6) | wicd-cli (= 1.7.0+ds1-6) | wicd-client; however:
|   Package wicd-gtk is not configured yet.
|   Package wicd-curses is not installed.
|   Package wicd-cli is not installed.
|   Package wicd-client is not installed.
|   Package wicd-gtk which provides wicd-client is not configured yet.
| dpkg: error processing wicd (--configure):
|  dependency problems - leaving unconfigured