HV: remove unused INVALID_VM_ID
The VM IDs which is high or equal then CONFIG_MAX_VM_NUM are all
invalid VM IDs, the MACRO has never been referenced in code, so
remove it;
#include <e820.h>
#include <vm_config.h>
-#define INVALID_VM_ID 0xffffU
-
struct vm_hw_info {
/* vcpu array of this VM */
struct acrn_vcpu vcpu_array[CONFIG_MAX_VCPUS_PER_VM];
