Revert "OS-8005 bhyve memory pressure needs to target ARC better (#354)"
This reverts commit a6033573eedd94118d2b9e65f45deca0bf4b42f7.

*** 9,19 ****
  # http://www.illumos.org/license/CDDL.
  #
  
  #
  # Copyright 2013 Pluribus Networks Inc.
! # Copyright 2020 Joyent, Inc.
  # Copyright 2020 Oxide Computer Company
  # Copyright 2021 OmniOS Community Edition (OmniOSce) Association.
  #
  
  #
--- 9,19 ----
  # http://www.illumos.org/license/CDDL.
  #
  
  #
  # Copyright 2013 Pluribus Networks Inc.
! # Copyright 2019 Joyent, Inc.
  # Copyright 2020 Oxide Computer Company
  # Copyright 2021 OmniOS Community Edition (OmniOSce) Association.
  #
  
  #
*** 36,46 ****
          global:
                  vcpu_reset;
                  vm_activate_cpu;
                  vm_active_cpus;
                  vm_apicid2vcpu;
-                 vm_arc_resv;
                  vm_assign_pptdev;
                  vm_capability_name2type;
                  vm_capability_type2name;
                  vm_close;
                  vm_copy_setup;
--- 36,45 ----