Drop the MIPS Innobase patch that it is already fixed upstream

The author James Cowgill confirmed the patch can be dropped due
to the issue being fixed by upstream by now.

debian/patches/mips-innobase-atomic.patch

-From: Debian MySQL Maintainers <pkg-mysql-maint@lists.alioth.debian.org>
-Date: Thu, 10 Aug 2017 20:40:29 +0200
-Subject: mips-innobase-atomic
-
----
- storage/innobase/include/os0sync.h | 1 +
- 1 file changed, 1 insertion(+)
-
---- a/storage/innobase/include/os0sync.h
-+++ b/storage/innobase/include/os0sync.h
-@@ -37,6 +37,7 @@ Created 9/6/1995 Heikki Tuuri
- 
- #include "univ.i"
- #include "ut0lst.h"
-+#include "sync0types.h"
- 
- /** CPU cache line size */
- #ifdef __powerpc__

debian/patches/series

@@ -9,7 +9,6 @@ mips-machine.patch
 #armhf_mroonga_storage_fail.patch
 c11_atomics.patch
 kFreeBSD-gettid.patch
-#mips-innobase-atomic.patch
 mytop-merge_src:mytop_improvements.patch
 Add_default_ExecStartPre_to_mariadb@.service.patch
 0024-Revert-to-using-system-pcre-library.patch