refactor(compiler-cli): expose ngtools api separately (#18952)

PR Close #18952

packages/compiler-cli/src/transformers/api.ts

@@ -250,13 +250,6 @@ export interface Program {
    */
   loadNgStructureAsync(): Promise<void>;
 
-  /**
-   * Retrieve the lazy route references in the program.
-   *
-   * Angular structural information is required to produce these routes.
-   */
-  getLazyRoutes(cancellationToken?: ts.CancellationToken): {[route: string]: string};
-
   /**
    * Emit the files requested by emitFlags implied by the program.
    *

packages/compiler-cli/src/transformers/program.ts

@@ -134,8 +134,6 @@ class AngularCompilerProgram implements Program {
         });
   }
 
-  getLazyRoutes(cancellationToken?: ts.CancellationToken): {[route: string]: string} { return {}; }
-
   emit({emitFlags = EmitFlags.Default, cancellationToken, customTransformers,
         emitCallback = defaultEmitCallback}: {
     emitFlags?: EmitFlags,