Revert "tracing: Allow creating instances with specified system events"

This reverts commit f568fbe8 which is
commit d2356997 upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: I34a657f370e2c152d1d6092d65f9a70c3c9fde93
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>