debian: Remove 56_ignore_runstatedir.diff.

This patch has now been applied in next, so its presence among the Debian
patches would cause quilt to fail for those trying to build packages from
next.

debian/patches/56_ignore_runstatedir.diff

@@ -1,16 +0,0 @@
-Description: Ignore runstatedir in check-cmdline-options-doc.sh
- autoconf 2.70 will add a --runstatedir option, Debian has backported it.
- Ignore it when checking whether INSTALL is up to date.
-Author: Andreas Metzler <ametzler@debian.org>
-Origin: vendor
-
---- wmaker-0.95.7.orig/Makefile.am
-+++ wmaker-0.95.7/Makefile.am
-@@ -106,6 +106,7 @@ configure-documentation:
- 		--ignore-prg 'enable-shared,enable-static # should be in INSTALL' \
- 		--ignore-prg 'disable-option-checking,enable-fast-install # should be in INSTALL' \
- 		--ignore-prg 'disable-libtool-lock,with-pic,with-gnu-ld,with-sysroot # for libtool' \
-+		--ignore-prg 'runstatedir #new in autoconf 2.70, backported in Debian' \
- 		--ignore-prg 'with-x # no use, it would not work without X'
- 
- .PHONY: configure-documentation

debian/patches/series

@@ -3,4 +3,3 @@
 53_Debian_WMState.diff
 54_Debian_wmmacros.diff
 55_ungif_problem.diff
-56_ignore_runstatedir.diff