perf: use built-in target option

Author: sxzz

src/index.ts

@@ -227,16 +227,7 @@ async function getBuildOptions(
       plugins.push(Unused.rolldown(unused === true ? {} : unused))
     }
     if (target) {
-      plugins.push(
-        transformPlugin({
-          include: /\.[cm]?[jt]sx?$/,
-          exclude: /\.d\.[cm]?ts$/,
-          transformOptions: {
-            target,
-          },
-        }),
-        RuntimeHelperCheckPlugin(target),
-      )
+      plugins.push(RuntimeHelperCheckPlugin(target))
     }
     plugins.push(ShebangPlugin(cwd, name, isMultiFormat))
   }
@@ -296,6 +287,7 @@ async function getBuildOptions(
       name: config.globalName,
       sourcemap,
       dir: outDir,
+      target,
       minify,
       entryFileNames,
       chunkFileNames,