[runtime] Remove the unused weird %Likely and %Unlikely intrinsics.

src/compiler/js-intrinsic-lowering.cc

Index: src/compiler/js-intrinsic-lowering.cc
diff --git a/src/compiler/js-intrinsic-lowering.cc b/src/compiler/js-intrinsic-lowering.cc
index f11e627e72cb23b8aad00fbd575b55ee34c6ea95..379f8b7490263f3cd872a1c8ca3fc0e91850f28f 100644
--- a/src/compiler/js-intrinsic-lowering.cc
+++ b/src/compiler/js-intrinsic-lowering.cc
@@ -63,8 +63,6 @@ Reduction JSIntrinsicLowering::Reduce(Node* node) {
       return ReduceIsSmi(node);
     case Runtime::kInlineJSValueGetValue:
       return ReduceJSValueGetValue(node);
-    case Runtime::kInlineLikely:
-      return ReduceUnLikely(node, BranchHint::kTrue);
     case Runtime::kInlineMapGetInstanceType:
       return ReduceMapGetInstanceType(node);
     case Runtime::kInlineMathClz32:
@@ -83,8 +81,6 @@ Reduction JSIntrinsicLowering::Reduce(Node* node) {
       return ReduceSeqStringGetChar(node, String::TWO_BYTE_ENCODING);
     case Runtime::kInlineTwoByteSeqStringSetChar:
       return ReduceSeqStringSetChar(node, String::TWO_BYTE_ENCODING);
-    case Runtime::kInlineUnlikely:
-      return ReduceUnLikely(node, BranchHint::kFalse);
     case Runtime::kInlineValueOf:
       return ReduceValueOf(node);
     case Runtime::kInlineIsMinusZero:
@@ -341,29 +337,6 @@ Reduction JSIntrinsicLowering::ReduceStringGetLength(Node* node) {
 }
 
 
-Reduction JSIntrinsicLowering::ReduceUnLikely(Node* node, BranchHint hint) {
-  std::stack<Node*> nodes_to_visit;
-  nodes_to_visit.push(node);
-  while (!nodes_to_visit.empty()) {
-    Node* current = nodes_to_visit.top();
-    nodes_to_visit.pop();
-    for (Node* use : current->uses()) {
-      if (use->opcode() == IrOpcode::kJSToBoolean) {
-        // We have to "look through" ToBoolean calls.
-        nodes_to_visit.push(use);
-      } else if (use->opcode() == IrOpcode::kBranch) {
-        // Actually set the hint on any branch using the intrinsic node.
-        NodeProperties::ChangeOp(use, common()->Branch(hint));
-      }
-    }
-  }
-  // Apart from adding hints to branchs nodes, this is the identity function.
-  Node* value = NodeProperties::GetValueInput(node, 0);
-  ReplaceWithValue(node, value);
-  return Changed(value);
-}
-
-
 Reduction JSIntrinsicLowering::ReduceValueOf(Node* node) {
   // if (%_IsSmi(value)) {
   //   return value;