refactor(@angular/build): remove unused exports

Remove the `export` keyword from four symbols that are only referenced within
their defining file: `calculateThresholds` and `checkThresholds`, whose
external callers moved to `checkBudgets` in 4d27c38;
`augmentAppWithServiceWorkerCore`, which is only called by the exported
wrapper functions; and `getEntryPointName`, whose external call sites were
removed in 75abe2c. The two threshold functions also leave the unsupported
`private` entry point, which re-exports the bundle calculator module; neither
`@angular-devkit/build-angular` nor `@angular/cli` references them, and both
still compile. The public API golden is unchanged.

Author: MeAkib

packages/angular/build/src/tools/esbuild/utils.ts

@@ -285,7 +285,7 @@ export function isZonelessApp(polyfills: string[] | undefined): boolean {
   return !polyfills?.some((p) => p === 'zone.js' || /\.[mc]?[jt]s$/.test(p));
 }
 
-export function getEntryPointName(entryPoint: string): string {
+function getEntryPointName(entryPoint: string): string {
   return basename(entryPoint)
     .replace(/(.*:)/, '') // global:bundle.css  -> bundle.css
     .replace(/\.[cm]?[jt]s$/, '')

packages/angular/build/src/utils/bundle-calculator.ts

@@ -58,7 +58,7 @@ export interface BudgetStats {
   assets?: BudgetAsset[];
 }
 
-export function* calculateThresholds(budget: BudgetEntry): IterableIterator<Threshold> {
+function* calculateThresholds(budget: BudgetEntry): IterableIterator<Threshold> {
   if (budget.maximumWarning) {
     yield {
       limit: calculateBytes(budget.maximumWarning, budget.baseline, 1),
@@ -354,7 +354,7 @@ export function* checkBudgets(
   }
 }
 
-export function* checkThresholds(
+function* checkThresholds(
   thresholds: Iterable<Threshold>,
   size: number,
   label?: string,

packages/angular/build/src/utils/service-worker.ts

@@ -213,7 +213,7 @@ export async function augmentAppWithServiceWorkerEsbuild(
   );
 }
 
-export async function augmentAppWithServiceWorkerCore(
+async function augmentAppWithServiceWorkerCore(
   config: Config,
   serviceWorkerFilesystem: Filesystem,
   baseHref: string,