[tests] Cleanup tests that use assertOptimized()/assertUnoptimized().

test/mjsunit/regress/regress-2618.js

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-// Flags: --use-osr --allow-natives-syntax --ignition-osr
+// Flags: --use-osr --allow-natives-syntax --ignition-osr --crankshaft
 
 function f() {
   do {
     do {
       for (var i = 0; i < 10; i++) %OptimizeOsr();
     } while (false);
   } while (false);
 }
 
 f();
-assertTrue(%GetOptimizationCount(f) > 0 || %GetOptimizationStatus(f) == 4);
+assertTrue(%GetOptimizationCount(f) > 0);
 
 function g() {
   for (var i = 0; i < 1; i++) { }
 
   do {
     do {
       for (var i = 0; i < 1; i++) { }
     } while (false);
   } while (false);
 
@@ skipping 10 matching lines @@
               } while (false);
             } while (false);
           } while (false);
         } while (false);
       } while (false);
     } while (false);
   } while (false);
 }
 
 g();
-assertTrue(%GetOptimizationCount(g) > 0 || %GetOptimizationStatus(g) == 4);
+assertTrue(%GetOptimizationCount(g) > 0);