Remove webkitgtk from archive

liferea upstream bug - https://github.com/lwindolf/liferea/issues/311 - (Launchpad doesn't support github bugs - bug 848666).

Version 2.16.4 uses webkit2.

The port to webkit2gtk[1] has been complete for quite a while now. Need to touch base with Scott and Robert to decide how to move forward with replacing current (deprecated) lightdm-webkit-greeter package with a new package for lightdm-webkit2-greeter.

[1] https://github.com/antergos/lightdm-webkit2-greeter

This bug was fixed in the package evolution - 3.21.90-0ubuntu1

---------------
evolution (3.21.90-0ubuntu1) yakkety; urgency=medium

  * New upstream release (LP: #1613291, LP: #1588150)
  * debian/control:
    - Build-depend on libwebkit2gtk-4.0-dev instead of libwebkitgtk-3.0-dev
    - Bump e-d-s dependencies and build-dependencies to 3.21.90
  * debian/rules:
    - Fix evolution-dbg migration rule
  * Bump dh compat to 10
  * debian/libevolution.install:
    - csv2vcard and addressbook-export have moved to e-d-s
  * debian/patches/lower-webkit-dependency.patch:
    - Don't require webkit2gtk 2.13 yet

 -- Jeremy Bicha <email address hidden> Fri, 19 Aug 2016 13:24:42 -0400

liferea has a RC now that was ported to webkit2gtk. Unfortunately, it regresses Unity support, see bug 1637385 for more info.

liferea is done: https://launchpad.net/ubuntu/+source/liferea/1.12~rc2-2ubuntu1

This bug was fixed in the package surf - 2.0-2

---------------
surf (2.0-2) unstable; urgency=low

  * Upload to unstable.

 -- Reiner Herrmann <email address hidden> Sun, 18 Jun 2017 13:53:10 +0200

This bug was fixed in the package bijiben - 3.24.0-0ubuntu1

---------------
bijiben (3.24.0-0ubuntu1) artful; urgency=medium

  * New upstream release
  * debian/control:
    - Switch to webkit2gtk (LP: #1588150)
    - Drop obsolete Build-Depends on libedataserverui1.2-dev
  * Bump dh compat to 10
  * Backport 2 patches to fix build:
    - fix-redundant-decls-warning.patch
    - fix-format-warning.patch

 -- Jeremy Bicha <email address hidden> Fri, 16 Jun 2017 20:16:51 -0400

https://launchpad.net/ubuntu/+source/gtkpod/2.1.5-6
https://launchpad.net/ubuntu/+source/maildir-utils/0.9.18-2

This bug was fixed in the package geary - 0.12~20170613-0ubuntu4

---------------
geary (0.12~20170613-0ubuntu4) artful; urgency=medium

  * Try to fix geary on s390x

 -- Gianfranco Costamagna <email address hidden> Thu, 10 Aug 2017 14:52:08 +0200

xombrero was removed from Ubuntu artful

https://launchpad.net/ubuntu/+source/cairo-dock-plug-ins/3.4.1-0ubuntu10

This bug was fixed in the package empathy - 3.25.90-0ubuntu1

---------------
empathy (3.25.90-0ubuntu1) artful; urgency=medium

  * New upstream release
  * debian/control:
    - Build-depend on libwebkit2gtk-4.0-dev instead of libwebkitgtk-3.0-dev
      (Closes: #866637) (LP: #1588150)
    - Bump Build-Depends on libglib2.0-dev to 2.48.0
    - Drop obsolete Build-Depends on libgnutls28-dev
  * Refresh patches
  * Drop patch applied in new release:
    - clutter-gst-3.0.patch
  * Update debian/watch
  * debian/empathy.install: Install appstream metadata in new location

 -- Jeremy Bicha <email address hidden> Thu, 17 Aug 2017 10:29:29 -0400

gnome-web-photo has been removed from Debian and from Ubuntu 17.10

I'm marking this a duplicate of the newer bug 1710318 because the other bug is more direct for the final steps needed here.