[rhythmbox] remove some obsolete bits of configure.ac

[Jonathan Matthew <jmatthew src gnome org>]

commit afa343e964b2db4de8bdc215e26c1035e09e8c7b
Author: Jonathan Matthew <jonathan d14n org>
Date:   Wed Jul 8 22:46:11 2015 +1000

    remove some obsolete bits of configure.ac

 configure.ac |    7 -------
 1 files changed, 0 insertions(+), 7 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index b23f79c..94f8f63 100644
--- a/configure.ac
+++ b/configure.ac
@@ -9,7 +9,6 @@ AC_CONFIG_HEADERS(config.h)
 AM_INIT_AUTOMAKE([1.11 tar-ustar dist-xz no-dist-gzip -Wno-portability])
 
 AM_MAINTAINER_MODE([enable])
-GNOME_MAINTAINER_MODE_DEFINES
 
 # plugin API versioning
 # Increment on interface addition, reset on removal
@@ -419,12 +418,6 @@ AM_GNU_GETTEXT([external])
 AC_SUBST([GETTEXT_PACKAGE], [rhythmbox])
 AC_DEFINE_UNQUOTED([GETTEXT_PACKAGE], "$GETTEXT_PACKAGE", [Define to the gettext package name.])
 
-dnl Workaround for automake 1.8
-AC_SUBST(mkdir_p) if test x"$mkdir_p" = "x"; then
-  MKINSTALLDIRS="mkinstalldirs"
-fi
-AC_SUBST(MKINSTALLDIRS)
-
 dnl LIRC
 AC_ARG_ENABLE(lirc,
        AC_HELP_STRING([--enable-lirc],[enable lirc support]))