refactor(ci): simplify CMake job limit plugin by removing app/build.gradle patching

plugins/withCmakeJobLimit.js

@@ -6,17 +6,15 @@ const MAX_JOBS = '8';
 
 // React Native's hermes-engine build hardcodes
 //   Runtime.getRuntime().availableProcessors()
-// for cmake --build -j, ignoring all env vars.
+// for `cmake --build -j`, ignoring the CMAKE_BUILD_PARALLEL_LEVEL env var.
 // On high-core CI runners this exhausts memory.
-// This plugin patches hermes-engine/build.gradle.kts
+// This plugin caps it during prebuild.
-// during prebuild to cap parallel jobs.
 const withCmakeJobLimit = (config) =>
   withDangerousMod(config, [
     'android',
     async (config) => {
       const root = config.modRequest.projectRoot;
 
-      // 1. Patch hermes-engine: availableProcessors() -> "8"
       const hermesPath = path.join(
         root,
         'node_modules',
@@ -32,25 +30,7 @@ const withCmakeJobLimit = (config) =>
           `"${MAX_JOBS}"`,
         );
         fs.writeFileSync(hermesPath, content);
-      }
+        console.log(`[withCmakeJobLimit] capped hermes-engine jobs to ${MAX_JOBS}`);
-
-      // 2. Patch app/build.gradle: add cmake -j argument to externalNativeBuild
-      const appGradlePath = path.join(
-        config.modRequest.platformProjectRoot,
-        'app',
-        'build.gradle',
-      );
-      if (fs.existsSync(appGradlePath)) {
-        let content = fs.readFileSync(appGradlePath, 'utf-8');
-        // Insert externalNativeBuild cmake arguments block inside the android { } block
-        // We add it right after "ndkVersion rootProject.ext.ndkVersion"
-        if (!content.includes('CMAKE_BUILD_PARALLEL_LEVEL')) {
-          content = content.replace(
-            /(\s*ndkVersion rootProject\.ext\.ndkVersion)/,
-            `$1\n    externalNativeBuild {\n        cmake {\n            arguments "-j${MAX_JOBS}"\n        }\n    }`,
-          );
-        }
-        fs.writeFileSync(appGradlePath, content);
       }
 
       return config;