sphinx: fix links when the link text should be displayed

When an hyperlink should be display in the output, there is no need to
any specific syntax or marker, the parser finds links and mail
addresses in ordinary text. Somehow the conversion from pandoc
generated wrong output in the form: ` <link>`__. This patch is
generated using the following Python regexp:

    line = re.sub("` <(https?://.*)>`__",
                  "\\1",
                  line)

(From yocto-docs rev: a35d735a74425dff34c63c086947624467658c40)

Signed-off-by: Nicolas Dechesne <nicolas.dechesne@linaro.org>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/overview-manual/overview-manual-concepts.rst

@@ -385,7 +385,7 @@ figure <#general-workflow-figure>`__:
 -  *Metadata (``.bb`` + Patches):* Software layers containing
    user-supplied recipe files, patches, and append files. A good example
    of a software layer might be the
-   ```meta-qt5`` <https://github.com/meta-qt5/meta-qt5>`__ layer from
+   ```meta-qt5`https://github.com/meta-qt5/meta-qt5 layer from
    the `OpenEmbedded Layer
    Index <http://layers.openembedded.org/layerindex/branch/master/layers/>`__.
    This layer is for version 5.0 of the popular

documentation/overview-manual/overview-manual-development-environment.rst

@@ -381,12 +381,12 @@ commands.
 .. note::
 
    -  For more information on Git, see
-      ` <http://git-scm.com/documentation>`__.
+      http://git-scm.com/documentation.
 
    -  If you need to download Git, it is recommended that you add Git to
       your system through your distribution's "software store" (e.g. for
       Ubuntu, use the Ubuntu Software feature). For the Git download
-      page, see ` <http://git-scm.com/download>`__.
+      page, see http://git-scm.com/download.
 
    -  For information beyond the introductory nature in this section,
       see the "`Locating Yocto Project Source