Revert "interconnect: Add helpers for enabling/disabling a path"

This reverts commit 5335bb0c which is
commit 7d374b20 upstream.

It breaks the Android abi.  If it is required in the future, it can
come back in an abi-safe way.

Bug: 161946584
Change-Id: Ib8055fa9cc98b8884b49de2588d45ceff8b9a2e3
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>