fastmodel: Delete the unused ArmFastModelBin.
fastmodel: Delete the unused ArmFastModelBin.

Change-Id: I29fb6cdfac809fb0a3577470143714b1da2d4562
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/52703
Maintainer: Gabe Black <d3e8afea784ab4a50a2dbf9149d2eaa8478e1cbc@gmail.com>
Tested-by: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>
Reviewed-by: Earl Ou <82591a79653dd29c9ce06ea2b578447596bef9ab@google.com>

gem5/gem5,gem5/gem5,gem5/gem5,gem5/gem5,gem5/gem5,gem5/gem5,gem5/gem5