Remove glossary

This is not really actively maintained and is duplicate of the one
available in openstack-manuals.

Change-Id: I6617397585e49501a20e758877c4071a1f3b9d84

doc/source/index.rst

@@ -99,8 +99,6 @@ Pick the documents that best match your user profile.
      - * `Image Service API Reference <https://docs.openstack.org/api-ref/image/>`_
        * `Image Service API Guide <https://specs.openstack.org/openstack/glance-specs/specs/api/v2/image-api-v2.html>`_
        * :doc:`user/index`
-   * - **Everyone**
-     - Here's a handy :doc:`glossary` of terms related to Glance
 
 .. toctree::
    :hidden:
@@ -111,4 +109,3 @@ Pick the documents that best match your user profile.
    install/index
    configuration/index
    user/index
-   glossary

doc/source/install/get-started.rst

@@ -2,9 +2,8 @@
 Image service overview
 ======================
 
-The Image service (glance) enables users to discover,
+The Image service (glance) enables users to discover, register, and retrieve
-register, and retrieve virtual machine images. It offers a
+virtual machine images. It offers a REST API that enables you to query virtual
-:term:`REST <RESTful>` API that enables you to query virtual
 machine image metadata and retrieve an actual image.
 You can store virtual machine images made available through
 the Image service in a variety of locations, from simple file

doc/source/install/verify.rst

@@ -37,9 +37,9 @@ For information about how to manage images, see the
 
       Install ``wget`` if your distribution does not include it.
 
-#. Upload the image to the Image service using the
+#. Upload the image to the Image service using the QCOW2 (QEMU Copy On Write 2)
-   :term:`QCOW2 <QEMU Copy On Write 2 (QCOW2)>` disk format, :term:`bare`
+   disk format, bare container format, and public visibility so all projects
-   container format, and public visibility so all projects can access it:
+   can access it:
 
    .. code-block:: console