hst: remove enablement json adapter

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

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

internal/outcome/sppulse_test.go

@@ -21,7 +21,7 @@ func TestSpPulseOp(t *testing.T) {
 	newConfig := func() *hst.Config {
 		config := hst.Template()
 		config.DirectPulse = true
-		config.Enablements = hst.NewEnablements(hst.EPulse)
+		config.Enablements = new(hst.EPulse)
 		return config
 	}