Revert "sched/deadline: Collect sched_dl_entity initialization"

This reverts commit 842010e3 which is
commit 9e07d45c 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: I35d4109f189e1b322ce6ff9a27b52bea1b6f0a14
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>