update bpf readme (#50674)

bpf/README.md

@@ -79,17 +79,11 @@ Example:
 
 ## BPF in Teleport
 
-Teleport uses BPF to implement enhanced session recording and restricted networking. Both features work only on Linux with
+Teleport uses BPF to implement enhanced session recording. Enhanced session recording works only on Linux with
 the kernel 5.8+. Enhanced session recording records all:
 * exec family system calls
 * open family system calls
 * network connections
 
-All events are recorded in the audit log. See https://goteleport.com/docs/server-access/guides/bpf-session-recording/.
-
-Restricted networking allows you to restrict network access for users.
-It's implemented by using LSM hooks and BPF programs (
-see https://goteleport.com/docs/server-access/guides/restricted-session/).
-On ubuntu systems LSM hooks are not enabled in some versions.
-Here are the instructions on how to enable them https://github.com/gravitational/teleport/issues/8089#issuecomment-924990678.
+All events are recorded in the audit log. See https://goteleport.com/docs/enroll-resources/server-access/guides/bpf-session-recording/.