[gtkmm-documentation] Remove obsolete and redundant README and TODO files

[Kjell Ahlstedt <kjellahl src gnome org>]

commit 6b560c2600fb459ffa13cb880c6971072b58693b
Author: Kjell Ahlstedt <kjellahlstedt gmail com>
Date:   Fri May 17 11:01:50 2019 +0200

    Remove obsolete and redundant README and TODO files

 docs/tutorial/README | 13 -------------
 docs/tutorial/TODO   | 39 ---------------------------------------
 examples/Makefile.am |  4 +---
 examples/book/README |  2 --
 4 files changed, 1 insertion(+), 57 deletions(-)
---
diff --git a/examples/Makefile.am b/examples/Makefile.am
index 5d7630d..67ee852 100644
--- a/examples/Makefile.am
+++ b/examples/Makefile.am
@@ -122,9 +122,7 @@ check_PROGRAMS =                                    \
        others/treemodelcustom/example
 #Waiting for a gdk_cairo_region_from_surface(): others/window/wheelbarrow
 
-dist_noinst_DATA =                             \
-       README                                  \
-       book/README                             \
+dist_noinst_DATA = \
        book/builder/basic/basic.glade          \
        book/builder/derived/derived.glade      \
        book/buttons/button/info.xpm            \