cpu: Delete unnecessary create() methods.

These were added in changes which were created before create() methods
were mostly automated, but were checked in after the then unnecessary
create() methods were purged.

Change-Id: I03da797ae8328fab6ef6b85dbc4ea86b34512fd5
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/42743
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Gabe Black <gabe.black@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
4 files changed