[Blazor] Remove sourcemap link comments from production bundles for blazor.web.js and blazor.webassembly.js (#62558)

* Removes sourcemap link comments from production bundles for blazor.web.js and blazor.webassembly.js

Author: Copilot

src/Components/Web.JS/rollup.config.mjs

@@ -13,7 +13,7 @@ export default createBaseConfig({
     'blazor.webview': './src/Boot.WebView.ts',
   },
   dir: __dirname,
-  updateConfig: (config, environment, _, input) => {
+  updateConfig: (config, environment, output, input) => {
     config.plugins.push({
       name: 'Resolve dotnet.js dynamic import',
       resolveDynamicImport(source, importer) {
@@ -26,6 +26,9 @@ export default createBaseConfig({
 
     if (input.includes("WebView")) {
       config.output.sourcemap = 'inline';
+    } else if (environment === 'production' && (output === 'blazor.web' || output === 'blazor.webassembly')) {
+      // Generate sourcemaps but don't emit sourcemap link comments for production bundles
+      config.output.sourcemap = 'hidden';
     } else {
       config.output.sourcemap = true;
     }