refactor(@angular/build): remove undefined variable in aot-compilation on 22.0.x

Fixes a build failure on the 22.0.x branch caused by a reference to undefined variable useTypeScriptTranspilation in aot-compilation.ts.

Author: alan-agius4

packages/angular/build/src/tools/angular/compilation/aot-compilation.ts

@@ -183,12 +183,11 @@ export class AotCompilation extends AngularCompilation {
     // diagnostics are already suppressed at the consumption layer (see the compiler-plugin
     // `diagnoseFiles` mask), and in the isolatedModules fast path emit is per-file, so the
     // set is never read. Skip the walk in that case to avoid a discarded semantic pass.
-    const affectedFiles =
-      useTypeChecking || useTypeScriptTranspilation
-        ? profileSync('NG_FIND_AFFECTED', () =>
-            findAffectedFiles(typeScriptProgram, angularCompiler, usingBuildInfo),
-          )
-        : new Set<ts.SourceFile>();
+    const affectedFiles = useTypeChecking
+      ? profileSync('NG_FIND_AFFECTED', () =>
+          findAffectedFiles(typeScriptProgram, angularCompiler, usingBuildInfo),
+        )
+      : new Set<ts.SourceFile>();
 
     const componentResourcesDependencies = new Map<string, string[]>();