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

test/debugger/debug/regress/regress-prepare-break-while-recompile.js

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 // Flags: --concurrent-recompilation --block-concurrent-recompilation
-// Flags: --no-always-opt
 
 if (!%IsConcurrentRecompilationSupported()) {
   print("Concurrent recompilation is disabled. Skipping this test.");
   quit();
 }
 
-assertFalse(isAlwaysOptimize());
-
 Debug = debug.Debug
 
 function foo() {
   var x = 1;
   return x;
 }
 
 function bar() {
   var x = 2;
   return x;
@@ skipping 16 matching lines @@
 Debug.setListener(null);
 
 // At this point, concurrent recompilation is still blocked.
 assertUnoptimized(foo, "no sync");
 // Let concurrent recompilation proceed.
 %UnblockConcurrentRecompilation();
 
 // Install optimized code when concurrent optimization finishes.
 // This needs to be able to deal with shared code being a builtin.
 assertUnoptimized(foo, "sync");