--- ./base/allocator/partition_allocator/tagging.cc.orig
+++ ./base/allocator/partition_allocator/tagging.cc
@@ -19,15 +19,6 @@
 #define PR_GET_TAGGED_ADDR_CTRL 56
 #define PR_TAGGED_ADDR_ENABLE (1UL << 0)
 
-#if BUILDFLAG(IS_LINUX)
-#include <linux/version.h>
-
-// Linux headers already provide these since v5.10.
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 10, 0)
-#define HAS_PR_MTE_MACROS
-#endif
-#endif
-
 #ifndef HAS_PR_MTE_MACROS
 #define PR_MTE_TCF_SHIFT 1
 #define PR_MTE_TCF_NONE (0UL << PR_MTE_TCF_SHIFT)