pam_rundir: remove patch

setting SECBIT_NO_SETUID_FIXUP in a pam module is a bad idea:
https://github.com/void-linux/void-packages/issues/4417

srcpkgs/pam_rundir/patches/fix.diff

@@ -1,21 +0,0 @@
---- pam_rundir.c
-+++ pam_rundir.c
-@@ -24,6 +24,8 @@
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <sys/file.h>
-+#include <sys/prctl.h>
-+#include <linux/securebits.h>
- #include <string.h>
- #include <pwd.h>
- #include <fcntl.h>
-@@ -396,6 +398,9 @@ pam_sm_open_session (pam_handle_t *pamh, int flags, int argc, const char **argv)
-             goto done;
-         }
-
-+        /* to bypass permission checks for mkdir, in case it isn't group
-+         * writable */
-+        prctl (PR_SET_SECUREBITS, SECBIT_NO_SETUID_FIXUP);
-         /* set euid so if we do create the dir, it is own by the user */
-         if (seteuid (pw->pw_uid) < 0)
-         {

srcpkgs/pam_rundir/template

@@ -1,7 +1,7 @@
-# Template file for 'pam_rundir-1.0.0'
+# Template file for 'pam_rundir'
 pkgname=pam_rundir
 version=1.0.0
-revision=2
+revision=3
 build_style=configure
 configure_args="--prefix=/usr --with-parentdir=/run/user"
 makedepends="pam-devel"