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

@@ -36,11 +36,11 @@
  * A full copy of the text of the CDDL should have accompanied this
  * source.  A copy of the CDDL is also available via the Internet at
  * http://www.illumos.org/license/CDDL.
  *
  * Copyright 2015 Pluribus Networks Inc.
- * Copyright 2020 Joyent, Inc.
+ * Copyright 2019 Joyent, Inc.
  */
 
 #ifndef _VMM_DEV_H_
 #define _VMM_DEV_H_
 

@@ -370,11 +370,10 @@
 #define VM_GET_CPUS                     (VMM_IOC_BASE | 0x1c)
 #define VM_SUSPEND_CPU                  (VMM_IOC_BASE | 0x1d)
 #define VM_RESUME_CPU                   (VMM_IOC_BASE | 0x1e)
 
 #define VM_PPTDEV_DISABLE_MSIX          (VMM_IOC_BASE | 0x1f)
-#define VM_ARC_RESV                     (VMM_IOC_BASE | 0xfe)
 
 #define VM_DEVMEM_GETOFFSET             (VMM_IOC_BASE | 0xff)
 
 #define VMM_CTL_DEV             "/dev/vmmctl"