[strong] Fix weird work-around for magic truncating int conversions.

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index 9b2a2f6a078341f7cacbc40eaec9557450444801..204a300bda4645102ece56251354fb71c67939ac 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -11008,23 +11008,6 @@ HValue* HGraphBuilder::BuildBinaryOperation(
     Add<HPushArguments>(left, right);
     instr = AddUncasted<HInvokeFunction>(function, 2);
   } else {
-    if (is_strong(strength) && Token::IsBitOp(op)) {
-      // TODO(conradw): This is not efficient, but is necessary to prevent
-      // conversion of oddball values to numbers in strong mode. It would be
-      // better to prevent the conversion rather than adding a runtime check.
-      IfBuilder if_builder(this);
-      if_builder.If<HHasInstanceTypeAndBranch>(left, ODDBALL_TYPE);
-      if_builder.OrIf<HHasInstanceTypeAndBranch>(right, ODDBALL_TYPE);
-      if_builder.Then();
-      Add<HCallRuntime>(
-          isolate()->factory()->empty_string(),
-          Runtime::FunctionForId(Runtime::kThrowStrongModeImplicitConversion),
-          0);
-      if (!graph()->info()->IsStub()) {
-        Add<HSimulate>(opt_id, REMOVABLE_SIMULATE);
-      }
-      if_builder.End();
-    }
     switch (op) {
       case Token::ADD:
         instr = AddUncasted<HAdd>(left, right, strength);