[regexp] Remove unused code

src/compiler/linkage.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/linkage.h"
 
 #include "src/ast/scopes.h"
 #include "src/builtins/builtins-utils.h"
 #include "src/code-stubs.h"
 #include "src/compilation-info.h"
@@ skipping 150 matching lines @@
     case Runtime::kInlineFixedArraySet:
     case Runtime::kInlineGeneratorClose:
     case Runtime::kInlineGeneratorGetInputOrDebugPos:
     case Runtime::kInlineGeneratorGetResumeMode:
     case Runtime::kInlineGetSuperConstructor:
     case Runtime::kInlineIsArray:
     case Runtime::kInlineIsJSReceiver:
     case Runtime::kInlineIsRegExp:
     case Runtime::kInlineIsSmi:
     case Runtime::kInlineIsTypedArray:
-    case Runtime::kInlineRegExpFlags:
-    case Runtime::kInlineRegExpSource:
       return false;
 
     default:
       break;
   }
 
   // For safety, default to needing a FrameState unless whitelisted.
   return true;
 }
 
@@ skipping 309 matching lines @@
     DCHECK(loc == regloc(kContextRegister, MachineType::AnyTagged()));
     return LinkageLocation::ForCalleeFrameSlot(Frame::kContextSlot,
                                                MachineType::AnyTagged());
   }
 }
 
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8