rm: anda/desktops/elementary/ (terrapkg#2055)

No more elementary/pantheon.

close terrapkg#1954

(cherry picked from commit 2b55f1f)

# Conflicts:
#	anda/desktops/elementary/appcenter/elementary-appcenter.spec
#	anda/desktops/elementary/elementary-camera/elementary-camera.spec
#	anda/desktops/elementary/elementary-shortcut-overlay/elementary-shortcut-overlay.spec
#	anda/desktops/elementary/elementary-theme/elementary-theme.spec
#	anda/desktops/elementary/switchboard-plug-keyboard/switchboard-plug-keyboard.spec
#	anda/desktops/elementary/switchboard-plug-pantheon-shell/switchboard-plug-pantheon-shell.spec
#	anda/desktops/elementary/wingpanel-indicator-datetime/wingpanel-indicator-datetime.spec
#	anda/desktops/elementary/wingpanel-indicator-keyboard/wingpanel-indicator-keyboard.spec
#	anda/desktops/elementary/wingpanel-indicator-nightlight/wingpanel-indicator-nightlight.spec
#	anda/desktops/elementary/wingpanel-indicator-notifications/wingpanel-indicator-notifications.spec