Revert of [tests] Make assertOptimized()/assertUnoptimized() great again.

test/mjsunit/compiler/concurrent-proto-change.js

Index: test/mjsunit/compiler/concurrent-proto-change.js
diff --git a/test/mjsunit/compiler/concurrent-proto-change.js b/test/mjsunit/compiler/concurrent-proto-change.js
index e9fcdc69f578ce8f06f664ee97c95ba67dde0e66..3abf292c924b19fd2a27c06254972121dfefa08b 100644
--- a/test/mjsunit/compiler/concurrent-proto-change.js
+++ b/test/mjsunit/compiler/concurrent-proto-change.js
@@ -27,14 +27,11 @@
 
 // Flags: --allow-natives-syntax
 // Flags: --concurrent-recompilation --block-concurrent-recompilation
-// Flags: --no-always-opt
 
 if (!%IsConcurrentRecompilationSupported()) {
   print("Concurrent recompilation is disabled. Skipping this test.");
   quit();
 }
-
-assertFalse(isAlwaysOptimize());
 
 function f(foo) { return foo.bar(); }