Re-delete the legacy build in rollup

Author: NullVoxPopuli

rollup.config.mjs

@@ -28,18 +28,6 @@ const testDependencies = [
 let configs = [
   esmConfig(),
   esmProdConfig(),
-  legacyBundleConfig('./broccoli/amd-compat-entrypoints/ember.debug.js', 'ember.debug.js', {
-    isDeveloping: true,
-  }),
-  legacyBundleConfig('./broccoli/amd-compat-entrypoints/ember.debug.js', 'ember.prod.js', {
-    isDeveloping: false,
-  }),
-  legacyBundleConfig('./broccoli/amd-compat-entrypoints/ember-testing.js', 'ember-testing.js', {
-    isDeveloping: true,
-    isExternal(source) {
-      return !source.startsWith('ember-testing');
-    },
-  }),
   templateCompilerConfig(),
   glimmerComponent(),
   glimmerSyntaxESM(),