hst: remove enablement json adapter

The go116 behaviour of built-in new function makes this cleaner.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/system/system.go

@@ -20,21 +20,21 @@ const (
 )
 
 // Criteria specifies types of Op to revert.
-type Criteria hst.Enablement
+type Criteria hst.Enablements
 
-func (ec *Criteria) hasType(t hst.Enablement) bool {
+func (ec *Criteria) hasType(t hst.Enablements) bool {
 	// nil criteria: revert everything except User
 	if ec == nil {
 		return t != User
 	}
 
-	return hst.Enablement(*ec)&t != 0
+	return hst.Enablements(*ec)&t != 0
 }
 
 // Op is a reversible system operation.
 type Op interface {
 	// Type returns [Op]'s enablement type, for matching a revert criteria.
-	Type() hst.Enablement
+	Type() hst.Enablements
 
 	apply(sys *I) error
 	revert(sys *I, ec *Criteria) error
@@ -44,8 +44,8 @@ type Op interface {
 	String() string
 }
 
-// TypeString extends [hst.Enablement.String] to support [User] and [Process].
-func TypeString(e hst.Enablement) string {
+// TypeString extends [hst.Enablements] to support [User] and [Process].
+func TypeString(e hst.Enablements) string {
 	switch e {
 	case User:
 		return "user"
@@ -110,7 +110,9 @@ func (sys *I) Equal(target *I) bool {
 	return true
 }
 
-// Commit applies all [Op] held by [I] and reverts all successful [Op] on first error encountered.
+// Commit applies all [Op] held by [I] and reverts all successful [Op] on first
+// error encountered.
+//
 // Commit must not be called more than once.
 func (sys *I) Commit() error {
 	if sys.committed {