Remove unused function GeneratePreEntryCode from ia32 code generator.

vm/opt_code_generator_ia32.cc

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_IA32.
 #if defined(TARGET_ARCH_IA32)
 
 #include "vm/opt_code_generator.h"
 
 #include "vm/assembler_macros.h"
@@ skipping 351 matching lines @@
 
 void OptimizingCodeGenerator::TraceNotOpt(AstNode* node, const char* message) {
   if (FLAG_trace_optimization) {
     OS::Print("NOTOpt node ix: %d; %s: ", node->token_index(), message);
     AstPrinter::PrintNode(node);
     OS::Print("\n");
   }
 }
 
 
-// Check for stack overflow.
-// Note that first 5 bytes may be patched with a jump.
-// TODO(srdjan): Add check that no object is inlined in the first
-// 5 bytes (length of a jump instruction).
-void OptimizingCodeGenerator::GeneratePreEntryCode() {
-}
-
-
 void OptimizingCodeGenerator::CallDeoptimize(intptr_t node_id,
                                              intptr_t token_index) {
   __ call(&StubCode::DeoptimizeLabel());
   AddCurrentDescriptor(PcDescriptors::kOther, node_id, token_index);
 #if defined(DEBUG)
   __ int3();
 #endif
 }
 
 
@@ skipping 2506 matching lines @@
     }
   }
   // TODO(srdjan): Implement unary kSUB (negate) Mint.
   CodeGenerator::VisitUnaryOpNode(node);
 }
 
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32