sudo zypper rm "yast2"         
root's password:
Loading repository data...
Reading installed packages...
Resolving package dependencies...

The following 7 applications are going to be REMOVED:
  Choqok digiKam KGpg Konqueror ksudoku Showfoto YaST

The following 142 packages are going to be REMOVED:
  akonadi akregator amarok amarok-lang autoyast2-installation baloo-kioslaves
  baloo-pim breeze4-style choqok digikam digikam-lang digikam-libs
  digikam-plugin-color digikam-plugin-decorate digikam-plugin-enhance
  digikam-plugin-fxfilters digikam-plugin-transform gwenview k3b k3b-lang
  kaddressbook kcolorchooser kdeartwork4-screensaver kdebase4-libkonq
  kdebase4-nsplugin kdebase4-runtime kdebase4-runtime-branding-openSUSE
  kdebase4-workspace-branding-openSUSE kdebase4-workspace-libs kdelibs4
  kdelibs4-branding-openSUSE kdelibs4-core kdepasswd kdepim4 kdepim4-runtime
  kdepimlibs4 kdialog kdnssd keditbookmarks kfilemetadata kget kgpg kio_audiocd
  kio_mtp kipi-plugins kipi-plugins-acquireimage kipi-plugins-geolocation
  kipi-plugins-lang kmag kmahjongg kmail kmousetool knotes konqueror
  konqueror-plugins konsole4-part kontact kopete korganizer krdc kreversi kscd
  ksudoku ktorrent ktorrent-lang kwalletmanager kwebkitpart kwebkitpart-lang
  libakonadi4 libbaloofiles4 libbaloowidgets4 libkcddb4 libkcompactdisc4 libkde4
  libkdegames6 libkdepim4 libkdepimlibs4 libkfbapi1 libkfbapi-lang libkgapi2-2
  libkmahjongglib4 libkolab0 libkonq5 libkscreen libksuseinstall1 libktorrent5
  libktorrent5-lang libreoffice-kde4 mobipocket mozilla-kde4-integration okular
  patterns-openSUSE-kde patterns-openSUSE-kde_imaging
  patterns-openSUSE-kde_plasma patterns-openSUSE-kde_yast plasma5-session
  skanlite skanlite-doc skanlite-lang sweeper yast2 yast2-add-on yast2-apparmor
  yast2-auth-client yast2-bootloader yast2-control-center
  yast2-control-center-qt yast2-country yast2-firewall yast2-fonts yast2-inetd
  yast2-installation yast2-iscsi-client yast2-journal yast2-ldap yast2-mail
  yast2-metapackage-handler yast2-network yast2-nfs-client yast2-nis-client
  yast2-ntp-client yast2-online-update yast2-online-update-frontend
  yast2-packager yast2-pam yast2-printer yast2-proxy yast2-samba-client
  yast2-samba-server yast2-scanner yast2-security yast2-services-manager
  yast2-slp yast2-snapper yast2-sound yast2-storage yast2-sudo yast2-sysconfig
  yast2-tune yast2-update yast2-users yast2-vm

The following 4 patterns are going to be REMOVED:
  kde kde_imaging kde_plasma kde_yast

142 packages to remove.
After the operation, 447.2 MiB will be freed.