diff --git a/m4/libogg.m4 b/m4/libogg.m4
deleted file mode 100644
index f2b2857..0000000
--- a/m4/libogg.m4
+++ /dev/null
@@ -1,130 +0,0 @@
-dnl $Id$
-
-dnl # Check for a working installation of libogg.
-dnl # Provides appropriate --with configuration options, fills and substitutes
-dnl # the LIBOGG_CFLAGS, LIBOGG_CPPFLAGS, LIBOGG_LDFLAGS and LIBOGG_LIBS
-dnl # variables accordingly.
-
-
-dnl # Copyright (c) 2008 Moritz Grimm <mgrimm@mrsserver.net>
-dnl #
-dnl # Permission to use, copy, modify, and distribute this software for any
-dnl # purpose with or without fee is hereby granted, provided that the above
-dnl # copyright notice and this permission notice appear in all copies.
-dnl
-dnl # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-dnl # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-dnl # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-dnl # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-dnl # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-dnl # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
-dnl # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-
-
-dnl # For LIBOGG_CFLAGS, LIBOGG_CPPFLAGS, LIBOGG_LDFLAGS and LIBOGG_LIBS:
-dnl # AX_CHECK_LIBOGG([LIBOGG-VERSION], [ACTION-IF-FOUND],
-dnl #     [ACTION-IF-NOT-FOUND])
-
-
-AC_DEFUN([AX_CHECK_LIBOGG],
-[
-AC_REQUIRE([PKG_PROG_PKG_CONFIG])
-AC_ARG_VAR([LIBOGG_CFLAGS],
-	[C compiler flags for libogg])
-AC_ARG_VAR([LIBOGG_CPPFLAGS],
-	[C preprocessor flags for libogg])
-AC_ARG_VAR([LIBOGG_LDFLAGS],
-	[linker flags for libogg])
-AC_ARG_VAR([LIBOGG_LIBS],
-	[libraries to use for libogg])
-if test x"${prefix}" = "xNONE"; then
-	ax_check_libogg_prefix="/usr/local"
-else
-	ax_check_libogg_prefix="${prefix}"
-fi
-AC_CACHE_VAL([local_cv_have_lib_libogg],
-[
-local_cv_have_lib_libogg=no
-
-PKG_CONFIG_PATH="${PKG_CONFIG_PATH}:${ax_check_libogg_prefix}/lib/pkgconfig"
-if test -z "${PKG_CONFIG}"; then
-	AC_MSG_ERROR([The pkg-config utility is required.], [1])
-fi
-
-dnl ####### BEGIN CHECK ######
-PKG_CHECK_EXISTS([ogg $1], [
-dnl ##########################
-
-libogg_libs_autodetect=no
-if test -z "${LIBOGG_CFLAGS}"; then
-	LIBOGG_CFLAGS="`${PKG_CONFIG} --cflags-only-other ogg`"
-fi
-if test -z "${LIBOGG_CPPFLAGS}"; then
-	LIBOGG_CPPFLAGS="`${PKG_CONFIG} --cflags-only-I ogg`"
-fi
-if test -z "${LIBOGG_LDFLAGS}"; then
-	LIBOGG_LDFLAGS="\
-		`${PKG_CONFIG} --libs-only-L ogg` \
-		`${PKG_CONFIG} --libs-only-other ogg` \
-	"
-fi
-if test -z "${LIBOGG_LIBS}"; then
-	LIBOGG_LIBS="`${PKG_CONFIG} --libs-only-l ogg`"
-	libogg_libs_autodetect=yes
-fi
-
-ax_check_libogg_save_CFLAGS="${CFLAGS}"
-ax_check_libogg_save_CPPFLAGS="${CPPFLAGS}"
-ax_check_libogg_save_LDFLAGS="${LDFLAGS}"
-ax_check_libogg_save_LIBS="${LIBS}"
-AC_LANG_PUSH([C])
-CFLAGS="${CFLAGS} ${LIBOGG_CFLAGS}"
-CPPFLAGS="${CPPFLAGS} ${LIBOGG_CPPFLAGS}"
-LDFLAGS="${LDFLAGS} ${LIBOGG_LDFLAGS}"
-LIBS="${LIBOGG_LIBS} ${LIBS}"
-AC_CHECK_HEADER([ogg/ogg.h],
-[
-	AC_MSG_CHECKING([if libogg works])
-	AC_LINK_IFELSE(
-		[AC_LANG_PROGRAM(
-			[[
-			  #include <stdlib.h>
-			  #include <ogg/ogg.h>
-			]],
-			[[
-			  ogg_sync_init(NULL);
-			]]
-		)],
-		[
-		  AC_MSG_RESULT([yes])
-		  local_cv_have_lib_libogg=yes
-		],
-		[
-		  AC_MSG_RESULT([no])
-		]
-	)
-])
-CFLAGS="${ax_check_libogg_save_CFLAGS}"
-CPPFLAGS="${ax_check_libogg_save_CPPFLAGS}"
-LDFLAGS="${ax_check_libogg_save_LDFLAGS}"
-LIBS="${ax_check_libogg_save_LIBS}"
-AC_LANG_POP([C])
-
-dnl ####### END CHECK ########
-], [])
-dnl ##########################
-
-])
-
-AC_MSG_CHECKING([for libogg $1])
-if test x"${local_cv_have_lib_libogg}" = "xyes"; then
-	AC_MSG_RESULT([yes])
-	:
-	$2
-else
-	AC_MSG_RESULT([no])
-	:
-	$3
-fi
-
-])