Revert of Add unoptimized/optimized variants of MathFloor TF code stub

test/mjsunit/compiler/stubs/floor-stub.js

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-// Flags: --allow-natives-syntax --expose-natives-as=builtins --noalways-opt --turbo-filter=*
+// Flags: --allow-natives-syntax --expose-natives-as=builtins --noalways-opt
 
 const kExtraTypeFeedbackMinusZeroSentinel = 1;
-const kFirstJSFunctionTypeFeedbackIndex = 5;
 const kFirstSlotExtraTypeFeedbackIndex = 5;
 
-(function()  {
-  var stub1 = builtins.MathFloorStub("MathFloorStub", 1);
-  var tempForTypeVector = function(d) {
-    return Math.round(d);
+(function(){
+  var floorFunc = function() {
+    Math.floor(NaN);
   }
-  tempForTypeVector(5);
-  var tv = %GetTypeFeedbackVector(tempForTypeVector);
-  var floorFunc1 = function(v, first) {
-    if (first) return;
-    return stub1(stub1, kFirstSlotExtraTypeFeedbackIndex - 1, tv, undefined, v);
-  };
-  %OptimizeFunctionOnNextCall(stub1);
-  floorFunc1(5, true);
-  %FixedArraySet(tv, kFirstSlotExtraTypeFeedbackIndex - 1, stub1);
+  // Execute the function once to make sure it has a type feedback vector.
+  floorFunc(5);
+  var stub = builtins.MathFloorStub("MathFloorStub", 0);
   assertTrue(kExtraTypeFeedbackMinusZeroSentinel !==
-             %FixedArrayGet(tv, kFirstSlotExtraTypeFeedbackIndex));
-  assertEquals(5.0, floorFunc1(5.5));
+             %FixedArrayGet(%GetTypeFeedbackVector(floorFunc),
+                            kFirstSlotExtraTypeFeedbackIndex));
+  assertEquals(5.0, stub(floorFunc, 4, 5.5));
   assertTrue(kExtraTypeFeedbackMinusZeroSentinel !==
-             %FixedArrayGet(tv, kFirstSlotExtraTypeFeedbackIndex));
+             %FixedArrayGet(%GetTypeFeedbackVector(floorFunc),
+                            kFirstSlotExtraTypeFeedbackIndex));
   // Executing floor such that it returns -0 should set the proper sentinel in
   // the feedback vector.
-  assertEquals(-Infinity, 1/floorFunc1(-0));
+  assertEquals(-Infinity, 1/stub(floorFunc, 4, -0));
   assertEquals(kExtraTypeFeedbackMinusZeroSentinel,
-               %FixedArrayGet(tv, kFirstSlotExtraTypeFeedbackIndex));
-  %ClearFunctionTypeFeedback(floorFunc1);
+               %FixedArrayGet(%GetTypeFeedbackVector(floorFunc),
+                              kFirstSlotExtraTypeFeedbackIndex));
+  %ClearFunctionTypeFeedback(floorFunc);
 })();