Remove experimental fast-codegen. We are no longer working on this

src/full-codegen.h

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 71 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(BreakableStatementChecker);
 };
 
 
 // -----------------------------------------------------------------------------
 // Full code generator.
 
 class FullCodeGenerator: public AstVisitor {
  public:
-  enum Mode {
-    PRIMARY,
-    SECONDARY
-  };
-
   explicit FullCodeGenerator(MacroAssembler* masm)
       : masm_(masm),
         info_(NULL),
         nesting_stack_(NULL),
         loop_depth_(0),
         location_(kStack),
         true_label_(NULL),
         false_label_(NULL) {
   }
 
   static Handle<Code> MakeCode(CompilationInfo* info);
 
-  void Generate(CompilationInfo* info, Mode mode);
+  void Generate(CompilationInfo* info);
 
  private:
   class Breakable;
   class Iteration;
   class TryCatch;
   class TryFinally;
   class Finally;
   class ForIn;
 
   class NestedStatement BASE_EMBEDDED {
@@ skipping 422 matching lines @@
 
   friend class NestedStatement;
 
   DISALLOW_COPY_AND_ASSIGN(FullCodeGenerator);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_FULL_CODEGEN_H_