Remove "Share..." link in the details view as this capability is now part of Ratings and Reviews

The "Share..." links should not be present at all, because ratings and reviews should have replaced them. <https://wiki.ubuntu.com/SoftwareCenter/RatingsAndReviews#reviews-tweeting>

It seems quite reasonable to no longer have a share button in the details view, now that we have full microblogging integration via the reviews dialog. I have pushed a commit for this to my branch.

Dang, I worked from a cached copy of this bug is seems and so I didn't see that kiwinote already grabbed this one! Sorry about that, I'll unlink my branch and reassign back.

Thanks for the fix, kiwinote!

NOTE: We will require a UI freeze exception for this one.

This bug was fixed in the package software-center - 3.1.25

---------------
software-center (3.1.25) natty; urgency=low

  [ Kiwinote ]
  * data/ui/SoftwareCenter.ui:
    - mark the back/forward actions as translatable (LP: #742129)
  * softwarecenter/db/database.py,
    softwarecenter/models/appstore.py,
    softwarecenter/view/availablepane.py,
    others:
    - make custom lists work (LP: #712903)
  * softwarecenter/app.py,
    softwarecenter/distro/Ubuntu.py,
    softwarecenter/view/widgets/pathbar_gtk_atk.py:
    - when the supported filter is set to supported_only, navigate up if:
      - we are in a details view of an app which is not supported (LP: #480827)
      - we are in a list view which becomes empty
  * softwarecenter/app.py,
    softwarecenter/view/catview_gtk.py:
    - correctly count the nr of apps displayed in the recommended category and
      update it when needed (LP: #735634)
    - only display subcategories if they are non-empty (LP: #419270)
  * softwarecenter/backend/weblive.py:
    - don't crash if we try to delete a non-existent file (LP: #743511)
  * softwarecenter/db/reviews.py,
    softwarecenter/distro/Ubuntu.py:
    - fallback to ReviewLoaderJsonAsync when we can't use multiprocessing
      (LP: #741069)
    - fixes to make ReviewLoaderJsonAsync 'work' (ie most common cases)
  * softwarecenter/db/update.py:
    - don't import softwarecenter.log
  * softwarecenter/view/appdetailsview_gtk.py:
    - don't draw random boxes when we have an error layout (LP: #739269)
    - retire share button as we now have full microblogging support in the
      review dialog (LP: #592619, LP: #743765)
  * softwarecenter/view/appview.py:
    - correctly refresh listview when supported filters are changed
  * softwarecenter/view/catview.py:
    - if a category has subcategories, then category.query should include all
      items included in the subcategories, not a subset of these
  * softwarecenter/view/widgets/pathbar_gtk_atk.py:
    - avoid having a half-height pathbar (LP: #743614)
  * refresh .pot file

  [ Gary Lasker ]
  * softwarecenter/view/widgets/reviews.py:
    - fix crash if app_version is not defined when
      calling upstream_version_compare (LP: #746120)
  * softwarecenter/view/purchaseview.py:
    - disconnect webkit signal handlers when the webkit view
      is not showing (LP: #696861)
    - support 'user_cancelled' from the software-center-agent
      (LP: #641321)
  * softwarecenter/view/softwarepane.py,
    softwarecenter/view/widgets/actionbar.py:
    - animate the action bar show/hide
  * softwarecenter/view/appview.py:
    - in the AppViewFilter, also consider apps in the for-purchase
      channel as available; this allows them to show up in
      e.g. What's New (LP: #746679)

  [ Michael Vogt ]
  * softwarecenter/db/update.py:
    - ensure the iconname that comes from the software-center-agent
      does not contain a ".", the icon cache gets confused otherwise
  * merged lp:~evfool/software-center/sfix672229, many thanks to
    Robert Roth (LP: #672229)
  * merged lp:~alexeftimie/software-center/fix-704719-briefly-wrong-display,
    many thanks to Alex Eftimie (LP: #704719)
  * softwarecenter/view/purc...