Revert of Merged: Squashed multiple commits.

src/compiler/typed-optimization.cc

Index: src/compiler/typed-optimization.cc
diff --git a/src/compiler/typed-optimization.cc b/src/compiler/typed-optimization.cc
index 7ef012658e5bc8434632ff43add3c0a5e6a556be..e130a10e4eb8e196e9b153d7c52f5f0792b534b6 100644
--- a/src/compiler/typed-optimization.cc
+++ b/src/compiler/typed-optimization.cc
@@ -78,8 +78,6 @@
       return ReduceCheckHeapObject(node);
     case IrOpcode::kCheckMaps:
       return ReduceCheckMaps(node);
-    case IrOpcode::kCheckNumber:
-      return ReduceCheckNumber(node);
     case IrOpcode::kCheckString:
       return ReduceCheckString(node);
     case IrOpcode::kLoadField:
@@ -148,16 +146,6 @@
         return Replace(effect);
       }
     }
-  }
-  return NoChange();
-}
-
-Reduction TypedOptimization::ReduceCheckNumber(Node* node) {
-  Node* const input = NodeProperties::GetValueInput(node, 0);
-  Type* const input_type = NodeProperties::GetType(input);
-  if (input_type->Is(Type::Number())) {
-    ReplaceWithValue(node, input);
-    return Replace(input);
   }
   return NoChange();
 }