test: revert AoTPlugin size update (#5003)

Revert #4834

tests/e2e/tests/packages/webpack/weird.ts

@@ -15,12 +15,7 @@ export default function(skipCleaning: () => void) {
     .then(() => expectFileToExist('dist/0.app.main.js'))
     .then(() => expectFileToExist('dist/1.app.main.js'))
     .then(() => expectFileToExist('dist/2.app.main.js'))
-    // 4.0.0-beta.8 added roughly 80kb extra size (401kb to 480kb).
-    // For now we have fixed the test below, but when the size drops down again replace the
-    // two lines below with the commented one.
-    .then(() => expectFileSizeToBeUnder('dist/app.main.js', 481000))
-    .then(() => expectToFail(() => expectFileSizeToBeUnder('dist/app.main.js', 410000)))
-    // .then(() => expectFileSizeToBeUnder('dist/app.main.js', 410000))
+    .then(() => expectFileSizeToBeUnder('dist/app.main.js', 410000))
     .then(() => expectFileSizeToBeUnder('dist/0.app.main.js', 40000))
 
     // Skip code generation and rebuild.