refactor(@angular-devkit/build-angular): remove redundant prerendering content from vite devserver

In the devserver we do not perform ahead of time prerendering, instead we perform it during request time.

Author: alan-agius4

packages/angular_devkit/build_angular/src/builders/dev-server/vite-server.ts

@@ -39,8 +39,6 @@ interface OutputFileRecord {
   servable: boolean;
 }
 
-const SSG_MARKER_REGEXP = /ng-server-context=["']\w*\|?ssg\|?\w*["']/;
-
 function hashContent(contents: BinaryLike): Buffer {
   // TODO: Consider xxhash
   return createHash('sha256').update(contents).digest();
@@ -490,16 +488,6 @@ export async function setupServer(
                 return;
               }
 
-              const potentialPrerendered = outputFiles.get(posix.join(url, 'index.html'))?.contents;
-              if (potentialPrerendered) {
-                const content = Buffer.from(potentialPrerendered).toString('utf-8');
-                if (SSG_MARKER_REGEXP.test(content)) {
-                  transformIndexHtmlAndAddHeaders(url, potentialPrerendered, res, next);
-
-                  return;
-                }
-              }
-
               const rawHtml = outputFiles.get('/index.server.html')?.contents;
               if (!rawHtml) {
                 next();