[gnome-menus] Update HACKING and README

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 552d2a853c31fed7f4db922867d115433d263eb9
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Sat Jan 4 08:35:02 2020 -0600

    Update HACKING and README

 HACKING     | 27 ++++-----------------------
 Makefile.am |  3 +--
 README      | 17 ++++++-----------
 3 files changed, 11 insertions(+), 36 deletions(-)
---
diff --git a/HACKING b/HACKING
index 88bd2d2..439e75e 100644
--- a/HACKING
+++ b/HACKING
@@ -1,31 +1,12 @@
 Hacking on gnome-menus
 ======================
 
- + The development occurs in git:
+ + The development occurs on GitLab:
 
-     http://git.gnome.org/browse/gnome-menus
+     https://gitlab.gnome.org/GNOME/gnome-menus/
 
    For information on how to access GNOME git please read:
 
-     http://live.gnome.org/Git
+     https://wiki.gnome.org/Git
 
- + Please send patches as bug reports in GNOME Bugzilla:
-
-     https://bugzilla.gnome.org/ (product gnome-menus)
-
-   Your patch should be in unified diff form (the -u option to GNU
-   diff). See also:
-
-     http://live.gnome.org/GnomeLove/SubmittingPatches
-
- + Please try and send a patch against a recent version of this package.
-   Patches against git master are most preferable.
-
- + Don't commit any but the most trivial patches without approval.
-
- + Exceptions to this are:
-
-   - Translators may commit basic i18n related patches to the build
-     setup.
-   - Build sheriff are welcome - in accordance with the relevant build
-     sheriff constraints.
+ + Please send contributions as merge requests on GitLab.
diff --git a/Makefile.am b/Makefile.am
index 0513fd7..f33cee3 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -5,8 +5,7 @@ ACLOCAL_AMFLAGS = -I m4 ${ACLOCAL_FLAGS}
 DISTCHECK_CONFIGURE_FLAGS = --enable-introspection
 
 EXTRA_DIST =                   \
-       HACKING                 \
-       MAINTAINERS
+       HACKING
 
 MAINTAINERCLEANFILES = \
        $(srcdir)/INSTALL \
diff --git a/README b/README
index 8b79a42..4e85f22 100644
--- a/README
+++ b/README
@@ -2,7 +2,9 @@ gnome-menus
 ===========
 
 gnome-menus contains the libgnome-menu library, the layout configuration
-files for the GNOME menu, as well as a simple menu editor.
+files for the GNOME menu, as well as a simple menu editor. The layout
+files control the menu layout for the GNOME Classic desktop. They are
+unused in normal GNOME sessions and have no effect outside GNOME Classic.
 
 The libgnome-menu library implements the "Desktop Menu Specification"
 from freedesktop.org:
@@ -30,15 +32,8 @@ first need to run './autogen.sh'.
 How to report bugs
 ==================
 
-Bugs should be reported to the GNOME bug tracking system:
+Bugs should be reported on GitLab:
 
-   https://gitlab.gnome.org/GNOME/gnome-menus/
+   https://gitlab.gnome.org/GNOME/gnome-menus/issues
 
-You will need to create an account for yourself.
-
-Please read the following page on how to prepare a useful bug report:
-
-   https://bugzilla.gnome.org/page.cgi?id=bug-writing.html
-
-Please read the HACKING file for information on where to send changes or
-bugfixes for this package.
+Please send changes or bugfixes as merge requests on GitLab.