Schemas: Delete unused code from the previous refactors (#84254)

* Delete unused code from the previous refactors

* Sort imports

pkg/codegen/generators.go

@@ -15,19 +15,6 @@ type OneToMany codejen.OneToMany[kindsys.Kind]
 type ManyToOne codejen.ManyToOne[kindsys.Kind]
 type ManyToMany codejen.ManyToMany[kindsys.Kind]
 
-// ForLatestSchema returns a [SchemaForGen] for the latest schema in the
-// provided [kindsys.Kind]'s lineage.
-//
-// TODO this will be replaced by thema-native constructs
-func ForLatestSchema(k kindsys.Kind) SchemaForGen {
-	comm := k.Props().Common()
-	return SchemaForGen{
-		Name:    comm.Name,
-		Schema:  k.Lineage().Latest(),
-		IsGroup: comm.LineageIsGroup,
-	}
-}
-
 // SlashHeaderMapper produces a FileMapper that injects a comment header onto
 // a [codejen.File] indicating the main generator that produced it (via the provided
 // maingen, which should be a path) and the jenny or jennies that constructed the