Simplify empty import selection evidence

internal/engine/records.go

@@ -206,7 +206,6 @@ type importSelectionEvidence struct {
 	path     Path
 	location Location
 	selector importSelector
-	outcome  importSelectionOutcome
 }
 
 // ImportSelectionForFacade is a root-converted source-selection transport
@@ -215,7 +214,6 @@ type ImportSelectionForFacade struct {
 	Path     Path     // source-local import declaration path
 	Location Location // authored location and declaring source ID
 	Selector string   // path, dir, or glob
-	Outcome  string   // none for a completed empty optional selection
 }
 
 // SourceInfoImportSelectionsForFacade returns detached selection records for
@@ -229,7 +227,6 @@ func SourceInfoImportSelectionsForFacade(source SourceInfo) []ImportSelectionFor
 		result[index] = ImportSelectionForFacade{
 			Path: selection.path.clone(), Location: selection.location,
 			Selector: importSelectorString(selection.selector),
-			Outcome:  importSelectionOutcomeString(selection.outcome),
 		}
 	}
 	return result
@@ -250,13 +247,6 @@ func importSelectorString(value importSelector) string {
 	}
 }
 
-func importSelectionOutcomeString(value importSelectionOutcome) string {
-	if value == importSelectionNone {
-		return "none"
-	}
-	return ""
-}
-
 // SourceInfoPlacementModeForFacade converts private placement evidence to its
 // root-owned numeric representation.
 func SourceInfoPlacementModeForFacade(source SourceInfo) uint8 {