[gnote] Remove singleton

[Aurimas Černius <aurimasc src gnome org>]

commit c157d93b0160fa3a58e4c9e27cd7727ea69e11ec
Author: Aurimas Černius <aurisc4 gmail com>
Date:   Sun Dec 15 16:32:26 2019 +0200

    Remove singleton

 src/Makefile.am        |  1 -
 src/base/singleton.hpp | 59 --------------------------------------------------
 src/ignote.hpp         |  1 -
 src/notebase.hpp       |  1 -
 4 files changed, 62 deletions(-)
---
diff --git a/src/Makefile.am b/src/Makefile.am
index 79523823..0adc8549 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -70,7 +70,6 @@ DBUS_SOURCES=remotecontrolproxy.hpp remotecontrolproxy.cpp \
 libgnote_la_LDFLAGS = -release @LIBGNOTE_RELEASE@ -version-info @LIBGNOTE_VERSION_INFO@
 libgnote_la_LIBADD = $(LIBGNOTE_LIBS)
 libgnote_la_SOURCES = \
-       base/singleton.hpp \
        base/macros.hpp \
        gnome_keyring/keyringexception.hpp \
        gnome_keyring/ring.hpp gnome_keyring/ring.cpp \
diff --git a/src/ignote.hpp b/src/ignote.hpp
index 918460a7..ae83cb3f 100644
--- a/src/ignote.hpp
+++ b/src/ignote.hpp
@@ -21,7 +21,6 @@
 #define _IGNOTE_HPP_
 
 #include "mainwindow.hpp"
-#include "base/singleton.hpp"
 
 namespace gnote {
 
diff --git a/src/notebase.hpp b/src/notebase.hpp
index d6ce579a..8e769d7e 100644
--- a/src/notebase.hpp
+++ b/src/notebase.hpp
@@ -28,7 +28,6 @@
 #include <glibmm/ustring.h>
 #include <sigc++/signal.h>
 
-#include "base/singleton.hpp"
 #include "tag.hpp"
 #include "sharp/datetime.hpp"
 #include "sharp/xmlreader.hpp"