Remove unused history document copies

internal/engine/override_decode.go

@@ -10,7 +10,6 @@ import (
 // contributions alongside the effective typed value and its inspection data.
 type decodedOverrideResult struct {
 	value     reflect.Value
-	preCLI    *document.Node
 	final     *document.Node
 	presence  map[string]inputPresence
 	origins   map[string]Origin
@@ -30,7 +29,6 @@ func applyDecodedOverrides(
 		return decodedOverrideResult{}, []decodeIssue{{code: CodeSchemaUnsupportedType, message: "decoded configuration does not match the schema"}}
 	}
 
-	preCLI := document.Clone(decoded.final)
 	working, cloneIssue := cloneConfiguration(schema, decoded.value, defaultProjectionLimits())
 	if cloneIssue != nil {
 		return decodedOverrideResult{}, []decodeIssue{decodeIssueFromProjection(cloneIssue)}
@@ -76,7 +74,6 @@ func applyDecodedOverrides(
 
 	return decodedOverrideResult{
 		value:     working,
-		preCLI:    preCLI,
 		final:     final,
 		presence:  presence,
 		origins:   origins,