Revert "Update to v6.11 kernel headers."

Revert submission 3277111-kernel_611

Reason for revert: Droidmonitor created revert due to b/369448759.

Reverted changes: /q/submissionid:3277111-kernel_611

Change-Id: I3cabcc2c55904459c69dbfa81e6e65863a7e57cc
diff --git a/libc/kernel/uapi/linux/tcp_metrics.h b/libc/kernel/uapi/linux/tcp_metrics.h
index 46ca141..931f50c 100644
--- a/libc/kernel/uapi/linux/tcp_metrics.h
+++ b/libc/kernel/uapi/linux/tcp_metrics.h
@@ -4,8 +4,8 @@
  * See https://android.googlesource.com/platform/bionic/+/master/libc/kernel/
  * for more information.
  */
-#ifndef _UAPI_LINUX_TCP_METRICS_H
-#define _UAPI_LINUX_TCP_METRICS_H
+#ifndef _LINUX_TCP_METRICS_H
+#define _LINUX_TCP_METRICS_H
 #include <linux/types.h>
 #define TCP_METRICS_GENL_NAME "tcp_metrics"
 #define TCP_METRICS_GENL_VERSION 0x1
@@ -21,17 +21,6 @@
 };
 #define TCP_METRIC_MAX (__TCP_METRIC_MAX - 1)
 enum {
-  TCP_METRICS_A_METRICS_RTT = 1,
-  TCP_METRICS_A_METRICS_RTTVAR,
-  TCP_METRICS_A_METRICS_SSTHRESH,
-  TCP_METRICS_A_METRICS_CWND,
-  TCP_METRICS_A_METRICS_REODERING,
-  TCP_METRICS_A_METRICS_RTT_US,
-  TCP_METRICS_A_METRICS_RTTVAR_US,
-  __TCP_METRICS_A_METRICS_MAX
-};
-#define TCP_METRICS_A_METRICS_MAX (__TCP_METRICS_A_METRICS_MAX - 1)
-enum {
   TCP_METRICS_ATTR_UNSPEC,
   TCP_METRICS_ATTR_ADDR_IPV4,
   TCP_METRICS_ATTR_ADDR_IPV6,